Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c4efe5edcdd371…

MALICIOUS

PDF

30.1 KB Created: 2020-03-31 00:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1b2e99cdd9284ab221b1f0eb7f355ddb SHA-1: ad3f4c11ce2999fb61c5cf8cfcd31f93b955acf2 SHA-256: d0c4efe5edcdd3715370112c399b9dcbe54c910a085227c001bead2a5d09ed3e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure and numerous links suggest a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • 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.
  • 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 http://commercechristmasshoppe.com/uploads/1/3/0/9/130969526/130969526.html#normas+generales+de+auditoria+operacional
    • http://mirrorpayroll.net/uploads/1/3/0/8/130813848/velavo_siromili.pdf
    • http://comparateurelectrique.ca/uploads/1/3/0/5/130590334/3809783.pdf
    • http://joyreadingcenter.org/uploads/1/3/0/9/130969186/473dcc7.pdf
    • http://redhuma.com/uploads/1/3/0/5/130539449/puneselafepis-lilulijena.pdf
    • http://pleasantvalleyhomecare.com/uploads/1/3/0/7/130740547/jaxuxofiwixebezoxus.pdf
    • http://cacjourney.com/uploads/1/3/0/6/130604258/redaruz.pdf
    • http://northcotswolds.com/uploads/1/3/0/6/130639977/nomokulonukumusuf.pdf
    • http://premiervparking.com/uploads/1/3/0/7/130739214/seperetatufubima.pdf
    • http://damantrans.com/uploads/1/3/0/8/130813609/judofalopelan-vavopu-todadiniba.pdf
    • http://southernprovision.store/uploads/1/3/1/3/131380767/1b6f7b507.pdf
    • http://pavechecks.com/uploads/1/3/0/6/130620443/kekikam.pdf
    • http://duanebuildersgroup.com/uploads/1/3/0/2/130272458/9413ea92a0fe839.pdf
    • http://wildernessfamilies.org/uploads/1/3/0/5/130589240/6a4b265.pdf

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