Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0ae6a4eaa0aa81…

MALICIOUS

PDF

72.2 KB Created: 2021-03-22 03:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c41c1d426bff6e66a0eac81f4687e453 SHA-1: 014e42c6139fc2055e25c42694d637ee31fcdc38 SHA-256: ac0ae6a4eaa0aa81a3317467639848e59d45e34fdd39368f47d0be475b4c51cc
184 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 0.9557

Heuristics 5

  • 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 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.
  • 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://golowaki.ru/award?keyword=frequency+adverbs+examples+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376105/normal_5fca78579068e.pdfIn PDF document text
    • https://gazavado.weebly.com/uploads/1/3/4/3/134331045/zimepibugibozupadiz.pdfIn PDF document text
    • https://kakenemewaxe.weebly.com/uploads/1/3/4/6/134655752/a98c577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475737/normal_603549afac0a7.pdfIn PDF document text
    • https://semowonobepak.weebly.com/uploads/1/3/4/2/134235862/3840560.pdfIn PDF document text
    • https://fowidejufato.weebly.com/uploads/1/3/4/5/134582967/limamifibobujim.pdfIn PDF document text
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/6865244.pdfIn PDF document text
    • https://foroziroxodom.weebly.com/uploads/1/3/4/6/134647192/sekanodevom.pdfIn PDF document text
    • https://mogatuzutixu.weebly.com/uploads/1/3/4/6/134684840/0bf287.pdfIn PDF document text
    • https://fezekisovo.weebly.com/uploads/1/3/4/6/134661064/753e7ba17b9cbc.pdfIn PDF document text
    • https://wajupera.weebly.com/uploads/1/3/4/7/134763514/f066334381cf0.pdfIn PDF document text
    • https://vamawawu.weebly.com/uploads/1/3/0/8/130874524/sakibegudotuna.pdfIn PDF document text
    • https://lavivatum.weebly.com/uploads/1/3/1/4/131437335/medumixatekof-perijabaxiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380070/normal_6027380632372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_604339dd39050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_6039b030423dc.pdfIn PDF document text
    • https://figuzenage.weebly.com/uploads/1/3/4/4/134472600/dilukimoj.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/the_christmas_story_cast_and_crew.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/best_ferrari_testarossa.pdfIn PDF document text

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