Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6d3cbb1c01285a…

MALICIOUS

PDF

64.5 KB Created: 2020-04-11 07:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3fae0629e3a8316d28ea1cdf3a5a4811 SHA-1: ba46a1cbc63852e2b2d378abd7908399174d03fa SHA-256: 7b6d3cbb1c01285a550757161daea6ed5f536099dbe0a0b513ab58e6dabac208
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it functions as a dropper. It contains numerous external links, suggesting a link farm or SEO spam tactic to distribute further malicious content. The embedded URL 'http://votened.net/uploads/1/3/0/4/130489123/130489123.html#grand+tour+season+2+episode+4' is a primary indicator of the malicious redirection attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9019054-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9019054-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://votened.net/uploads/1/3/0/4/130489123/130489123.html#grand+tour+season+2+episode+4
    • http://lachambrehauteairdrie.org/uploads/1/3/0/6/130604286/3e0a3e0c0d8f.pdf
    • http://signsonthesideoftheroad.com/uploads/1/3/1/4/131408854/valinamebutaxufi.pdf
    • http://bigskyboost.com/uploads/1/3/1/4/131406487/72818f865a1.pdf
    • http://petrolheadfx.com/uploads/1/3/0/2/130289345/zaroguz_modumesavazizer_zazowizav.pdf
    • http://benibiz.com/uploads/1/3/0/5/130590499/127015.pdf
    • http://mollysides.com/uploads/1/3/1/3/131383515/vewiwutivevexosaz.pdf
    • http://altraver.com/uploads/1/3/1/4/131407253/8060246.pdf
    • http://imbali.net/uploads/1/3/1/4/131453321/gugupezukezuput.pdf
    • http://omnilifesalud.net/uploads/1/3/0/4/130483847/fibivu-wabekas-magel-pejuzuvixeli.pdf
    • http://donnaleephotography.com/uploads/1/3/0/2/130270836/6182656.pdf
    • http://legalvazquez.com/uploads/1/3/0/7/130739196/0a915af59a.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_off0000d353.bin
b0131a294163c25b639b301696a3fbc006963f9d2813a7c084e25cfab06a237d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD353 9816 bytes

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