Malicious PDF — malware analysis report

Static analysis result for SHA-256 18521ee6bd1de17f…

MALICIOUS

PDF

51.7 KB Created: 2021-03-13 16:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c269186de13da87f203dcbd2a9981590 SHA-1: 9e107df92e31b03be2eb537cdf8dc879086282e2 SHA-256: 18521ee6bd1de17f314d53c45bd6b25e37b0541c58dece4d22194f0f3ba57555
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 0.7151

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/award?keyword=cardiolipina+funcion+pdf PDF link annotation
    • http://hairsprof.ru/91139212589up8vg.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/jhaoeih/zivagawowizunadugu.pdfIn PDF document text
    • http://ranking-se.com/20530403270zio5e.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/fhhHxgf/control_game_cheat_codes_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/wolowivem/hiibigB/8005804736.pdfIn PDF document text
    • http://hookup682.site/16095218921k4h.pdfIn PDF document text
    • http://yarrebitteh.online/tumutdr87l.pdfIn PDF document text
    • http://mamontov-net.cc/16692054819aryv2.pdfIn PDF document text
    • http://lazadacostumercenter.com/14951647968kxirn.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/z9iiEqb/amtrak_route_nyc_to_washington_dc_map.pdfIn PDF document text
    • http://phrensy.co/rising_strong_audiobook_youtubewy63j.pdfIn PDF document text
    • http://obschee.xyz/lupobixurilubudo7qonu.pdfIn PDF document text
    • http://mon-cmso.best/why_does_my_circular_saw_blade_stop_spinningucc45.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7eef86-921b-4211-a980-fa2509eab230/88823895928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f1ad49-dbfe-44b5-99a7-e21668cccc32/86963952150.pdfIn PDF document text

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