Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2accb7dbca65e46…

MALICIOUS

PDF

48.3 KB Created: 2020-06-16 11:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ab3c90e99bf8c89f4ccc4d64f4c29b SHA-1: 870f56c516bd17a58c66d6718f49a7e693b70608 SHA-256: a2accb7dbca65e4690f3d9f731e0e16168caa454521075f4f090b61f39c96178
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains a URL that aligns with this observation. The primary purpose appears to be redirecting users to potentially malicious or ad-filled websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mariana-test.devsite-1.com/uploads/1/3/1/8/131856462/131856462.html#exercises+for+belly+fat+men
    • http://mail.jocelynmccauley.com/uploads/1/3/1/3/131381021/gazefasorenawix_wipegowo_rexelumid_kopinatabudo.pdf
    • http://imagodeiriverside.org/uploads/1/3/0/6/130639744/a792be1.pdf
    • http://artisticlicense.design/uploads/1/3/1/4/131406118/komusufafik-silif.pdf
    • http://honeykosmetics.com/uploads/1/3/1/4/131453544/suliwive-ruzajimoxukej-sunigawef.pdf
    • http://smcart.org/uploads/1/3/0/7/130739564/retoroj_wevabija.pdf
    • http://marocatt.org/uploads/1/3/0/6/130605174/4440523.pdf
    • http://ideocgs.com/uploads/1/3/1/4/131453175/8205417.pdf
    • http://general1948.com/uploads/1/3/1/3/131383383/1453577.pdf
    • http://3tm.undesirable.us/uploads/1/3/0/5/130551809/e52eb754a9202a.pdf
    • http://teambirths.com/uploads/1/3/0/6/130621958/dunumajiwojogev_kepevutebezuv_jogasol.pdf
    • http://speakerfitness.com/uploads/1/3/0/5/130550664/7968972.pdf
    • http://carltonplaisance.com/uploads/1/3/0/5/130543494/xodatabugusa_vatinobal_newalanukijakeb_tenelajabadaz.pdf
    • http://smcart.org/uploads/1/3
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ef4.bin
7b332bfc5fbcc83e7b298dea726a9703001888442835571f9f0a8daeb1de1d66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF4 11000 bytes

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