Malicious PDF — malware analysis report

Static analysis result for SHA-256 198c7ba45d12f912…

MALICIOUS

PDF

28.1 KB Created: 2020-05-08 20:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 532e782f8938db7fe9aa6be319a6d5ca SHA-1: 9811466e6b16b642d61e9f473cad12b5758608f9 SHA-256: 198c7ba45d12f9129a497e0c8734a9eae3708eba69c5e6e1cd25a0df12d417ba
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body contained mostly metadata and the URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://openlotusayurveda.com/uploads/1/3/0/6/130621082/130621082.html#time+conversion+worksheets+grade+3
    • http://indivisibleberks.org/uploads/1/3/0/8/130874378/bafevexi.pdf
    • http://wunderwagens.com/uploads/1/3/0/8/130814055/dezor.pdf
    • http://ironenergy.net/uploads/1/3/1/4/131437174/tegosu-gedubafo-ninanovap-wirijavunusolu.pdf
    • http://jbianchidesigns.com/uploads/1/3/0/6/130639635/suzolu.pdf
    • http://kidswritersclub.com/uploads/1/3/0/7/130738693/7ee9251bc71994.pdf
    • http://stuur-kracht.com/uploads/1/3/0/3/130313306/b295c031adc6c7b.pdf
    • http://michaelnsmithsuperintendent.com/uploads/1/3/0/3/130323656/516d6d1d19f42.pdf
    • http://cscarpentryservices.com/uploads/1/3/0/4/130476671/kugaje.pdf
    • http://boatridemiami.com/uploads/1/3/1/4/131453179/dupodoruwenini.pdf
    • http://jojoquince.com/uploads/1/3/1/4/131409546/dutibasafukidomasedo.pdf
    • http://ecolivinghk.com/uploads/1/3/0/7/130740433/fukovulifugar-sofibokavopat-kofupinenosu.pdf
    • http://q8caad.com/uploads/1/3/0/6/130603760/gedoz.pdf
    • http://criticalvictories.net/uploads/1/3/0/6/130604179/c99ad18.pdf
    • http://p-airms.com/uploads/1/3/1/4/131438641/f80a59.pdf

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