Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecae1fa63803600e…

MALICIOUS

PDF

38.8 KB Created: 2020-04-05 16:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be7cc7f0740a1e661e5cb4604ed1b264 SHA-1: 600aedb22932bf90e47b291e276a7dfba21710d0 SHA-256: ecae1fa63803600eab5eb7f094f633f227d1cee402f181f31d6960645f5ce712
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, many of which point to other PDF files with numeric slugs, indicative of a link farm or SEO spam operation. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to academic formatting and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://insightin2music.com/uploads/1/3/1/3/131384127/131384127.html#ensayo+en+formato+apa+word
    • http://naturesessences.ca/uploads/1/3/1/4/131452839/1081102.pdf
    • http://missheatherlee.com/uploads/1/3/1/4/131437822/711230.pdf
    • http://bpacontractorsme.com/uploads/1/3/0/4/130483422/1b3fa8.pdf
    • http://awingsproject.com/uploads/1/3/0/3/130313415/e44093e9e0e.pdf
    • http://mahyc.com/uploads/1/3/0/7/130739578/desipo.pdf
    • http://wwidbq.com/uploads/1/3/0/9/130969503/9ecb33c7e0c7.pdf
    • http://orangecountymicroblading.com/uploads/1/3/1/0/131070559/bagapane_xifol_velumedo.pdf
    • http://theinsideoutking.com/uploads/1/3/0/5/130541402/5074222.pdf
    • http://memoriesnparadise.com/uploads/1/3/0/5/130540504/9455440.pdf
    • http://thebrowtheory.com/uploads/1/3/0/6/130604482/popedete_fozikalixa_zitesun_vuwavalitimuma.pdf
    • http://sfchampions.com/uploads/1/3/0/5/130551651/topoxatatitowut-fivatibibalow-pofusubuvamu-napitunelusum.pdf
    • http://hsrpconsulting.com/uploads/1/3/0/7/130739705/acb17e3b8fe11a4.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_off00007063.bin
517f9831862dc56f38644858b1262b3bd768df5b30dafe1063c19d8d0e6cb0fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 8232 bytes

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