Malicious PDF — malware analysis report

Static analysis result for SHA-256 56571b01ea4e9bb8…

MALICIOUS

PDF

34.3 KB Created: 2020-03-29 12:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2851968f8b36eba15f8119d85be02575 SHA-1: ce934a6cdd4c05d6901b8879ee6946c161569e7a SHA-256: 56571b01ea4e9bb84b2502a34168277889acb227b092c8aa38853de4fa287a0c
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, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, includes a URL that points to a collection of PDF files. This suggests a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine ranking for malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://susiegigg.com/uploads/1/3/0/6/130621581/130621581.html#actividades+para+realizar+en+la+biblioteca+del+aula
    • http://leelastuepfertportfolio.com/uploads/1/3/0/5/130551957/sojusorero.pdf
    • http://hostmaster.ica-usa.org/uploads/1/3/1/3/131379439/nabofininavosu.pdf
    • http://appealyourvadisability.com/uploads/1/3/0/6/130620472/8d41a02b6.pdf
    • http://westernregionsamplescourier.net/uploads/1/3/1/1/131164052/xeguduwosafo.pdf
    • http://dunebeat.com/uploads/1/3/0/2/130270834/mowugufazir-kasazegelikiv.pdf
    • http://portsidecommunityartsfest.org/uploads/1/3/1/3/131384605/nimanizuvifaj.pdf
    • http://flyfishcrystalriver.com/uploads/1/3/0/6/130639203/8168001.pdf
    • http://thebloominary.com/uploads/1/3/0/5/130544725/1f434d9e.pdf
    • http://burbankhighswim.com/uploads/1/3/0/9/130968997/wexavudibe.pdf
    • http://kajoda.com/uploads/1/3/0/5/130588723/zuxofawo.pdf
    • http://wattsplumbingtn.com/uploads/1/3/0/4/130476649/3762052.pdf
    • http://naturaloasissalon.com/uploads/1/3/0/8/130814596/niderofabela_tujepix_baxegopuju.pdf
    • http://savvywellness.ca/uploads/1/3/0/6/130605355/5690816.pdf
    • http://telsaelectricfestival.com/uploads/1/3/1/3/131380236/f2c0aee83f53830.pdf
    • http://mightymicrogreen.com/uploads/1/3/0/4/130483584/rulex.pdf

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