Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29d7794b5b85923…

MALICIOUS

PDF

40.8 KB Created: 2021-06-16 12:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0b0c839acd477551fa8eb714e40874e SHA-1: 3f4c7df2f6b07c925eb03bb466487e2148776cc6 SHA-256: a29d7794b5b85923c07b374a4a343159eab57b148d6aac085461347866f603b9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8178

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://drafthe.ru/uplcv?utm_term=fiat+500+automatic+manual PDF link annotation
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d84b88acb6e20c139df887ec188e3842/13384842809.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/kosuzu.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/24f342ef0e035104ae4b9e8aa0446dd8/61598894882.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ba60d0fbb4360f8628516ae7e6527b0c/detigopefojuvu.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/eeb4dd4ddce39bd1e03c6909b11a0a5a/xitodogoxaxurizagozoni.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/17c0rach2bcp6udm4vubdu4n20/ratadabaluku.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/196381015dda3c87bd7e95faed0d455f/51713139217.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/12126877619.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/rilujubeboxixiwilolawanu.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/28482762443.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/nhi2nq2k5tesc7cbp2binb9bth/bajegeramedaxedekan.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/kowipemajanijiruzag.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086cd123242c---mebibivopidifukizonot.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/1f2td8i5e70gg95penqfht4l1b/71848528902.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e6afe10b89c0c57c0818e90fed68f731/57617361382.pdfIn PDF document text

Related samples 8

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