Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c6eb3852e6496b…

MALICIOUS

PDF

87.6 KB Created: 2021-08-06 22:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a03c83707f04cd9e1a7e0113bea4b413 SHA-1: 00c357879b8746451001b992b014e5d864921c79 SHA-256: 32c6eb3852e6496b7aef47da16be49b24fc979d997ff9b92ddfc179baaf57468
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to numerous PDF files hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The embedded URLs are likely part of a campaign to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b03f3c8e61c---nivazunogogakosijusozoso.pdf In PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607972ade9bbb---povavodaxaxibaxarotitoja.pdfIn PDF document text
    • http://builderall.info/userfiles/file/mewopepemizip.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/17471792941.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/57571785255.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/c492e6f82d37f330fd11a727d0372d0a/54083706518.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/caa73vnq2qr1hsvg47s49586n4/ropafogawafipun.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/kusaliv.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/lasogexafazagugow.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/4b3540fc69b21e88e57b26c4ddd6d4b3/47921336556.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/51866946574.pdfIn PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/98332146696.pdfIn PDF document text
    • https://www.jedeminute.de/wp-content/plugins/super-forms/uploads/php/files/782areqbvhignnst9hn0nr5e9t/72427822772.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/zelesaleri.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/p7959cq4mq2f2197p1bubalpfu/90489023285.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/jokjdatnhmhug2o6o5bm470q64/88506767664.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/bn5in7oa12alu3khk7fa2fioel/92762513264.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/9d30a460ee59f4824d394517f8560f2d/56684599324.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/kevogifimipot.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/3975248828.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/b4644d041dde146e0acd23c15727a57f/49487195724.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609c407807bdb---97697918219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+is+mannerism+quizlet+art+historyPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b4a58430ad9de49674ed84da080779e4/budivawobirebes.pdfIn PDF document text
    • 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_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABB 10788 bytes
SHA-256: 627242d8f0926b231ae14b1e242c1aa001b61ea94ac5750b2d104935d9bad1f5
font_02_sfnt_off00012373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12373 17256 bytes
SHA-256: 34b2692ff0890d338494dd4d0b8712bdfd8522e7db14a5edf66a5f2ebaa4c1f2

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