Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa7ca7dae5631a1…

MALICIOUS

PDF

20.9 KB Created: 2020-04-22 09:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 50eee8c5074d42293e269ca18ec1fe3d SHA-1: 323e38ea48100372607143e5e5e0adf5f80af9a7 SHA-256: 5aa7ca7dae5631a1db82e3a8d4951f8678e42510693bff24e3581a9a89a8eb4c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF contains a large number of external links, many of which point to other PDF files. This suggests a link farm or SEO manipulation tactic, potentially to distribute malicious content or host phishing pages. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://germantownfd.com/uploads/1/3/0/6/130620627/130620627.html#the+drummer+boy+of+shiloh+answer+key
    • http://ferrarilawpr.com/uploads/1/3/0/6/130620251/5725701.pdf
    • http://cbtutoring.com/uploads/1/3/0/6/130621502/lixeleruluxa.pdf
    • http://eccevideo.info/uploads/1/3/1/6/131606511/ganigufemosabiv-xutitos-zivixit-besuk.pdf
    • http://realms-minecraft.net/uploads/1/3/0/4/130477048/3246548.pdf
    • http://etheasworld.com/uploads/1/3/0/5/130539084/fijoxefox.pdf
    • http://tcncleanservice.com/uploads/1/3/0/7/130775572/1974375.pdf
    • http://yourdowntownmarket.com/uploads/1/3/1/3/131381722/nibuxa-daxekijigo-gixajajexulor.pdf
    • http://marshallmakes.com/uploads/1/3/0/8/130873978/6818c.pdf
    • http://discoverychurchhickory.net/uploads/1/3/1/4/131407796/tiwim.pdf
    • http://dmgcvirginia.com/uploads/1/3/1/4/131406564/pemobijetuv.pdf
    • http://nsedacademy-payments.org/uploads/1/3/1/4/131453006/xadamuw.pdf
    • http://passion4mission.com/uploads/1/3/0/4/130476981/335fc0d.pdf
    • http://factoryrefresh.com/uploads/1/3/0/5/130539251/tososizape.pdf
    • http://waterfronthotel.devsite-1.com/uploads/1/3/0/9/130969372/tipifefi-panoxiz.pdf
    • http://mr-spa.co.uk/uploads/1/3/0/3/130313063/kotazixamafad.pdf

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