Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2f1ddfdcef78d3…

MALICIOUS

PDF

85.8 KB Created: 2021-07-03 22:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c119c11542705a5e33a3a6e3ffa9718e SHA-1: d8f1933b1258e51b16bff5bfb24e308277f5d78d SHA-256: ca2f1ddfdcef78d3b01f0779a370e7c05bf9d7d637067b9521bd39676992073f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous external URIs. Several heuristics indicate the PDF is a link farm, with many links pointing to potentially compromised WordPress sites or disposable hosting. The presence of a raw IP address in one URL further suggests malicious intent, likely to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9762

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://geneolock.com/locktactyuma/userfiles/file/duzagovovawewosaxejeturu.pdf In PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/502c4377903cc05705fdcedd565f399f/28907124311.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ebji2srphtb33g56qrt0j5o0i4/zowuk.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/wifabipeminukupaw.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/d0e04ba748cab2d69d2b0973434e3e90/57828772326.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/valuxunegeritemomede.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16099e55aeea31---kajovutilawiwoxazuxevizul.pdfPDF link annotation
    • https://vivekanandbawwa.com/userfiles/file/80674541161.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/shh00lpjlm446in7e1ppg6b2u0/nimilokasulej.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/217eaeaf255b2472ea3071ae12629603/salewa.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2f17307614f3acf83f78e87dd7bba9f4/gimigewiwizipitogev.pdfIn PDF document text
    • https://fishuntpesca.it/file/12176379416.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609459e4b7e72---76557407208.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/ac0e71403f712a35f2f18fea3f00c4b4/mudod.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/9q8j16sd9frnenimhffsn6sh16/ziwoworidiraredizofabu.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/9fe8faf041bb2fe3746abe7a1ad869b9/19153906458.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/f743ede2ebf7f2a24d49ae3329ffa3a3/nurofepobuwaruxetusezumeb.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/8hmiet1blkahao2tup24ao8v24/pabebubabixefogalefodewog.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/3d3c24c54e53e645d78306b7a0e6a53f/vuzifi.pdfIn PDF document text
    • http://boxethai38.comupload/file/dukus.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/4f792c0be1bf90e17d7a9a88641d29ee/tijofuxewiwifumoge.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/vlm48t790t799ut42cs0vi60o7/25965385904.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0p06n72u126q4dl055bubmqpt6/watilituguforiwixu.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc2638cdc---36844480162.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/47b59464f4c1761412eb0fa6a8f914be/kavokepuwunu.pdfIn PDF document text
    • http://abpaluso.com/upload/file/gibeja.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/54omur5g49seerjm1rsf7a214g/manuxoxal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=labrinth+see+beneath+your+beautiful+mp3+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_01_sfnt_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 11332 bytes
SHA-256: 0075a122c9ad98ef7d2e2009f55a90adf7bf5f1dfcff8dcef3c5f69baa1555f4
font_02_sfnt_off000100ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100ED 17868 bytes
SHA-256: c0546f2de1ea5e392f8673b122c136dbd064052cb8e627e1ddbe9faba92b92b7
font_03_sfnt_off00012f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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