Malicious PDF — malware analysis report

Static analysis result for SHA-256 13371fc2574364f6…

MALICIOUS

PDF

25.5 KB Created: 2020-04-28 08:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0912ceb44df18d201253da2a9a199abc SHA-1: 8c1c0ad48221f8fadef77d4883663dd6c8acc36b SHA-256: 13371fc2574364f63f64a6ad518c36517b11744233757e85b0b623df28fae255
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which appear to be dynamically generated or part of a link farm. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest an attempt to redirect users to potentially malicious websites or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://centralcarolinasazaleasociety.org/uploads/1/3/0/3/130313191/130313191.html#employee+corrective+action+report+sample
    • http://cataproject.com/uploads/1/3/0/4/130491852/56774ee0902405.pdf
    • http://myrole.finance/uploads/1/3/0/6/130604279/2423298.pdf
    • http://jrjoseph.com/uploads/1/3/0/9/130969693/5213466.pdf
    • http://taverpale8.com/uploads/1/3/0/6/130621051/6604253.pdf
    • http://airphones.org/uploads/1/3/1/3/131379444/jadidisitisegozatuta.pdf
    • http://skyebluesalon.net/uploads/1/3/0/6/130620681/9925309.pdf
    • http://mettaseat.com/uploads/1/3/0/8/130874504/famurekezog_zepikexovegadil_pilid_dumajoneruj.pdf
    • http://maryannweber.com/uploads/1/3/0/4/130491852/ded65e55564ba1.pdf
    • http://allenparkpres.info/uploads/1/3/1/4/131409035/bifexubebikof.pdf
    • http://icyyluxlashes.com/uploads/1/3/1/4/131438233/a510124a1.pdf

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