Malicious PDF — malware analysis report

Static analysis result for SHA-256 f929a4827faf421d…

MALICIOUS

PDF

29.1 KB Created: 2020-05-23 12:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 989af738a69c5794f5c5824ccc18c33f SHA-1: f00404007646ec8e320a10e15d8fd2a8bc5f30f8 SHA-256: f929a4827faf421d6fa73284535dd25c7a7e56218875ec5d3f698acd5c16d2da
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or distribution network. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. No scripts were extracted from this sample, but the sheer volume of outbound links points to a malicious distribution or SEO manipulation scheme.

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://kw4kd.salon225.com/uploads/1/3/0/4/130490476/130490476.html#overkill+colin+hay+chords
    • http://jemporiumvintage.com/uploads/1/3/0/6/130604303/8132855.pdf
    • http://whirlingcurvish.com/uploads/1/3/1/8/131871883/6006861.pdf
    • http://thevelvetteddy.com/uploads/1/3/0/9/130969862/xasuvox.pdf
    • http://lillyjanesedibleflorals.com/uploads/1/3/0/7/130739930/kozabusufa_lapuxaputid_suxixowuwof.pdf
    • http://centralathletic.com/uploads/1/3/0/6/130605216/acb17b0b5cab.pdf
    • http://worryknotevents.com/uploads/1/3/2/3/132303374/8d86aa01.pdf
    • http://virginiemahe.fr/uploads/1/3/1/0/131070098/fafepev.pdf
    • http://mybodymysoul.org/uploads/1/3/0/2/130289778/3a928a741.pdf
    • http://jeffcimmino.com/uploads/1/3/0/3/130379194/e5900690f9de.pdf
    • http://stuijvesant.ch/uploads/1/3/0/5/130550682/jabuxusigunexowe.pdf
    • http://sandyandcompanyblog.com/uploads/1/3/0/5/130543063/c9da6957184.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_off000048ec.bin
af297820928cd19654e25e56e28b3b278431d39d576e1f031feeb310940d1782		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48EC 9564 bytes

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