Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d8bfeb167293720…

MALICIOUS

PDF

21.4 KB Created: 2020-04-05 04:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a2b6e29bbb5940158488cf4983b3f6f3 SHA-1: d375eb34639c092c79a8a2a3a2f80adebe0d5f84 SHA-256: 3d8bfeb1672937200d50aa01a9f45dd9c30387c8b055ba2bcd96d0c46aa3f50a
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm. The primary heuristic 'PDF_SEO_LINK_FARM' strongly suggests this malicious intent. The embedded URL also points to a similar structure. No scripts were extracted from this sample.

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://gigixpress.com/uploads/1/3/1/4/131407312/131407312.html#super+mario+bros+nds+romsmania
    • http://morrax.store/uploads/1/3/0/4/130483626/a1807.pdf
    • http://stairliftsonsale.com/uploads/1/3/1/4/131438667/cb8a87.pdf
    • http://formidablewine.com/uploads/1/3/0/5/130551876/affa83a5.pdf
    • http://morongovalley.org/uploads/1/3/1/4/131407691/7283209.pdf
    • http://clavesecurity.com/uploads/1/3/1/4/131482975/nazoxo-sirupa.pdf
    • http://jaysaaddison.com/uploads/1/3/1/3/131383721/1876128.pdf
    • http://onelifeonebody.net/uploads/1/3/0/6/130620695/174792.pdf
    • http://prohibitioninsideamerica.com/uploads/1/3/0/6/130605074/206e1ce3e94.pdf
    • http://kelseyelizabethphoto.com/uploads/1/3/0/2/130289792/08ebb4cc9.pdf
    • http://stylishbelleboutique.com/uploads/1/3/0/3/130323538/nesupukoguni.pdf
    • http://sullysidehustle.com/uploads/1/3/0/3/130313127/fopezidum.pdf
    • http://imanihandcrafted.com/uploads/1/3/1/1/131164406/ranofizonesobi-bepulujafak-xafisabodeni.pdf
    • http://susiepickett.com/uploads/1/3/0/6/130639776/70f1139347.pdf
    • http://ciceroheatingandcooling.com/uploads/1/3/0/7/130739498/1b13ebe7f5ee.pdf

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