Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ab1c09f173a9fa…

MALICIOUS

PDF

31.6 KB Created: 2020-05-13 01:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: acd4ef0dd1ee3330a5bfa9ada7f6ca82 SHA-1: d10362298b15bafe41fcce72983a491eba5977c8 SHA-256: 25ab1c09f173a9fa810fe5d9bc5ab69c62d8b6e2d00911a55d281eb3fab58724
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a significant number of external links, identified as a PDF link farm. The primary heuristic indicates a mass of external PDF links, suggesting a tactic to manipulate search engine results or redirect users to potentially malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the link farm itself is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://albagioielli.com/uploads/1/3/1/4/131406438/131406438.html#chundari+vave+female+ringtone
    • http://lifeadvantagesprep.com/uploads/1/3/0/6/130621225/5f41e5e393bb6.pdf
    • http://opendors.com/uploads/1/3/0/4/130436402/9704636.pdf
    • http://yposlingshot.com/uploads/1/3/0/5/130588692/mogix-duruta-tagitimel-balow.pdf
    • http://hannahhanson1.com/uploads/1/3/0/6/130621156/4ff42.pdf
    • http://traditionalapologetics.com/uploads/1/3/0/4/130483244/e23b5adfa7.pdf
    • http://crownllc.org/uploads/1/3/0/9/130969343/nubivuk.pdf
    • http://essentialoilsbykristine.com/uploads/1/3/0/5/130539597/muzixowilor-tafon-bexefavoz.pdf
    • http://mthopeucc.org/uploads/1/3/0/4/130477249/pemasugobil.pdf
    • 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_off00004f80.bin
615d800c7e9520d4564859e56964b095d72af1ba37dd8f340e552103eaf54592		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F80 10980 bytes

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