Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5b4813388932e6…

MALICIOUS

PDF

56.3 KB Created: 2021-05-18 08:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a026cf8a53a6a6e847fcecac2f0f3c0e SHA-1: 7f1fdf390be6895d272c6c56cfe85ae0a314e650 SHA-256: 7f5b4813388932e68e89abe6f2d7127185f1b94e347afe4696f405d5a46ff61f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'https://nipisod.ru/strik?utm_term=washburn+banjo+serial+numbers'. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further suggests malicious intent, likely related to phishing or malware distribution via the linked content. No scripts were extracted, but the structure indicates a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3709

Heuristics 4

  • 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
  • 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://nipisod.ru/strik?utm_term=washburn+banjo+serial+numbers
    • https://cdn-cms.f-static.net/uploads/4471692/normal_6040566124585.pdf
    • http://tinewipikawulu.iblogger.org/defiant_outdoor_heavy_duty_timer_instructions.pdf
    • https://static.s123-cdn-static.com/uploads/4479212/normal_6008d6e144157.pdf
    • https://cdn-cms.f-static.net/uploads/4498678/normal_606b294e02a73.pdf
    • https://static.s123-cdn-static.com/uploads/4421960/normal_6003403c33152.pdf
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5fd7b9a742863.pdf
    • https://cdn-cms.f-static.net/uploads/4451945/normal_600b056742e92.pdf
    • https://cdn-cms.f-static.net/uploads/4417808/normal_605ef5cd93f54.pdf
    • https://cdn-cms.f-static.net/uploads/4450512/normal_601a799bea80a.pdf
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/cc172b77d.pdf
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/guzuzufulukud.pdf
    • https://nulebuset.weebly.com/uploads/1/3/1/4/131411431/firavusemegame-sikutasoz-suwinojazu-bavoxu.pdf
    • https://cdn-cms.f-static.net/uploads/4487007/normal_5fdc44ad4bbd1.pdf
    • https://cdn-cms.f-static.net/uploads/4374540/normal_606e2d8352d71.pdf
    • https://cdn-cms.f-static.net/uploads/4479938/normal_60317c1e43029.pdf
    • https://zegazofegu.weebly.com/uploads/1/3/5/2/135296009/sezejemoguwakotopo.pdf
    • http://sejapamuji.22web.org/dolezataxamem.pdf
    • https://static.s123-cdn-static.com/uploads/4490920/normal_6007befe40bb4.pdf
    • https://cdn-cms.f-static.net/uploads/4408004/normal_601107eb18ed9.pdf
    • https://cdn-cms.f-static.net/uploads/4415051/normal_6026b0f68d165.pdf
    • http://bapipakaroxi.22web.org/problemas_de_aprendizaje_concepto.pdf
    • http://pubitawiwinas.rf.gd/xufijunebugodinale.pdf
    • http://vipuzot.rf.gd/93841916240.pdf
    • http://xadokij.epizy.com/gospel_of_barnabas.pdf
    • http://kotanefizipabu.rf.gd/ranukupelaxusovo.pdf
    • http://rixuzomobe.epizy.com/bidovedakej.pdf
    • http://pobediwawe.epizy.com/sipejubomar.pdf

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