Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bc7badb27741f5…

MALICIOUS

PDF

55.7 KB Created: 2021-06-13 05:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8072490960e42551fcd98b2571ee0e8f SHA-1: 1eb58350fe6d63b1fb6ff6cbaffa987c746226de SHA-256: a6bc7badb27741f5d68e0716286877feffe4e5f755c8db8bebe7e428e6243d06
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8511

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/pbw?utm_term=vygotsky+social+cognitive+theory PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485446/normal_5ff428bce466c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473041/normal_6050688777e98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_605863529c70e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402960/normal_5fec5060b8373.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4389354/normal_60b2f347d0102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503578/normal_60c0531483acf.pdfIn PDF document text
    • http://xovelezid.pbworks.com/w/file/fetch/144878118/new_tamil_2021_movies.pdfIn PDF document text
    • http://ronuzexem.pbworks.com/f/gajomerirakorovuvan.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/f/what_are_the_differences_between_aerobic_and_anaerobic_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0489fd77-5945-4455-84c0-0edc0b0a5ccc/bodyweight_exercises_for_biceps_no_bar.pdfIn PDF document text
    • http://jeveriwilum.pbworks.com/w/file/fetch/144599211/38419797275.pdfIn PDF document text
    • http://febokipup.pbworks.com/w/file/fetch/144578640/what_is_a_quintile_rank.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/w/file/fetch/144492381/xuxadunavo.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144578169/koremukan.pdfIn PDF document text
    • http://juboxeraris.pbworks.com/w/file/fetch/145116585/57972107556.pdfIn PDF document text
    • http://lajunola.pbworks.com/w/file/fetch/144877986/62827903227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a615c7-3ec4-4320-9d74-75def000c5ba/luliwukumawoxifezix.pdfIn PDF document text

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