Malicious PDF — malware analysis report

Static analysis result for SHA-256 388ed2b45907d431…

MALICIOUS

PDF

28.9 KB Created: 2020-03-07 14:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a65218ca9d3e3ee263f042a3395eab5 SHA-1: 1517c9d9880f14e07c275028603cd1d3ebc31f27 SHA-256: 388ed2b45907d4319fe4e800ee063e2b75cb34d9dc2f891cae62a45cb44ca4d8
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 to other PDF documents hosted on various domains, indicating a link farm or SEO manipulation tactic. One of the embedded links is to 'vivintsolarct.com', which is likely part of a phishing or malicious content delivery scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vivintsolarct.com/uploads/1/3/0/7/130775692/130775692.html#m%C3%BAsculos+agonistas+antagonistas+e+sinergistas
    • http://rikatsutsui.com/uploads/1/3/0/7/130739632/3995685.pdf
    • http://springflowerbookkeeping.com/uploads/1/3/0/4/130477663/6062365.pdf
    • http://www.marriageguys.com/uploads/1/3/0/7/130775173/d904146c.pdf
    • http://keithwithak.com/uploads/1/3/0/8/130874042/fojijasigilumulureb.pdf
    • http://triphibian.xyz/uploads/1/3/0/9/130969334/c0bf236.pdf
    • http://www.alltaxcontroversies.services/uploads/1/3/0/3/130323755/xugivoxaxezibawowi.pdf
    • http://omaiorlegado.com/uploads/1/3/0/5/130551880/749355.pdf
    • http://roughattheedge.com/uploads/1/3/0/7/130739227/218054.pdf
    • http://amsdiscounts.com/uploads/1/3/0/8/130813787/kojokomekeni.pdf
    • http://royalavenuemusic.com/uploads/1/3/0/4/130483581/9599485.pdf
    • http://www.thecommonclimber.com/uploads/1/3/0/7/130740524/6472897.pdf
    • http://olumlupsikoloji.com/uploads/1/3/0/4/130488983/xitakov.pdf

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