Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e07d963b77b9a7f…

MALICIOUS

PDF

75.8 KB Created: 2021-09-06 09:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dbfcc2ce4ab6421813efdd82fc918790 SHA-1: 4fd7d686f0a249bf9e451faba921d635fb19d49b SHA-256: 2e07d963b77b9a7f71f8687d55e6587e4cd4f73189023fe0ea5eb638faa5c8cc
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The presence of numerous unknown URLs suggests an attempt to distribute or phish.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://alperbehang.nl/userfiles/file/68216611317.pdf In PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/2dse77maroo4fk1v03jqls898i/febusizasawusafam.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210702232443_hrdch7.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/89298426432.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/rolumalusewijidizapovomu.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de70cb7aab4---36841878847.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/58213993987.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/12581855575.pdfIn PDF document text
    • https://ancoraeducacion.com/images/48122452972.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/83021043257.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/wofepofazajiledi.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608da6479cd13---naposuvuwezibiwuxepa.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/03fbde0ca3b45276775c52c561efc89f/83155652704.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/81909230379.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/nk2fls7fkic5uc6j09a5114ul1/88462979969.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/6cut3ng8tpg068206lohj06k23/depewajat.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/vovujidomodusube.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6f2b8f5e6---12122915835.pdfIn PDF document text
    • http://grandfiltr.com/files/file/folitojetixinavapogizito.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/20829357525.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090cc925bd55---58064624961.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/venisewonofoj.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740bb86afb1---suzibajilolufejixiwif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=leica+407+total+station+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC24D 18080 bytes
SHA-256: 9177da7c83e39f0885997ad6d87d3824e7cf85e6757095939727f9fc49a7b8d5
font_01_sfnt_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 10596 bytes
SHA-256: cf9294676152febfc59b7851acf05f17c73030c1ba0d004196d342b205bc6f98
font_02_sfnt_off00010867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10867 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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