Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82ccb5780882a3a…

MALICIOUS

PDF

44.9 KB Created: 2021-03-15 04:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 83da83b72b429ef62ec6e480ffa8f5cf SHA-1: e476834468ff95dc2a25b53837b535877a0c2c97 SHA-256: f82ccb5780882a3a89411ebc319a4f54a3dbe160b716ac0cef292d00a40c2d2b
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 0.7448

Heuristics 5

  • 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 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://midufefew.ru/award?keyword=bromatologia+mendoza+libro+pdf PDF link annotation
    • https://bonesinidojesu.weebly.com/uploads/1/3/4/5/134591006/zemolubib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5fd5ff6faf951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458839/normal_601fd28e05861.pdfIn PDF document text
    • https://pikezusepi.weebly.com/uploads/1/3/2/7/132740337/ef3b8023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387054/normal_5fd200fa873f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388160/normal_60000bbd860d7.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/OhiLnjf/72207933967.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/bokevewifedixewabimunini.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/44094836260.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/eCnieih/lojegavemoma.pdfIn PDF document text
    • https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/57b9390d.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/american_heart_association_acls_provider_manual_2020.pdfIn PDF document text
    • https://berebexamoleti.weebly.com/uploads/1/3/1/3/131384136/fuwozuluzudaruturit.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/kumumumexuwurutivanaja.pdfIn PDF document text
    • http://mimivudarevi.scienceontheweb.net/goodreader_password_protected.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479921/normal_6031fe15c78f5.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/rarobut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_60175f90cf99f.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/hcicibg/17082840032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463528/normal_604eaded5bb2c.pdfIn PDF document text

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