Malicious PDF — malware analysis report

Static analysis result for SHA-256 5834c8b6afa2163a…

MALICIOUS

PDF

62.9 KB Created: 2021-02-23 20:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8eb78937f3d2f8933953e2c69851b52 SHA-1: 0763064d089f82e23675fd0b69359f8d26078ee8 SHA-256: 5834c8b6afa2163a02936cb5c7824e5d57d03e64c7b01d6b21af25ba81cdc487
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, with numerous external links pointing to various domains, many of which are hosted on disposable platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9514

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=watch+star+trek+2009+online+free+1080p
    • https://wiruwopifezub.weebly.com/uploads/1/3/4/3/134345133/76555bcf3537bf4.pdf
    • https://cdn-cms.f-static.net/uploads/4393362/normal_601d237e64c7d.pdf
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fea272602589.pdf
    • https://pokifinib.weebly.com/uploads/1/3/4/0/134017941/mulode_zujegusilaximiz_sidasewi_fuwagugarefef.pdf
    • https://fubapisa.weebly.com/uploads/1/3/1/4/131406294/6549312.pdf
    • https://static.s123-cdn-static.com/uploads/4464327/normal_5ff9ad6673cb9.pdf
    • http://j3vnci4.xyz/boxometofo4t2cj.pdf
    • https://cdn-cms.f-static.net/uploads/4409425/normal_60326604a8f65.pdf
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/5037701.pdf
    • https://pupiwukonavi.weebly.com/uploads/1/3/2/6/132682553/titazokobin.pdf
    • https://fulidozemupure.weebly.com/uploads/1/3/1/3/131384797/xujimixexufuf_megemomipir.pdf
    • http://naturaleone.space/best_ringtone_for_my_android_phonefejf5.pdf
    • http://delaem-sami.online/how_to_use_my_dish_hopper_remotemzxrm.pdf
    • http://reduslim-buy.site/what_is_the_role_of_team_captain_in_debatezvwm2.pdf
    • https://s3.amazonaws.com/rerinago/androidx._constraintlayout._widget._constraintlayout_must_be_declared.pdf

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