Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0417fe3449f6dd…

MALICIOUS

PDF

52.9 KB Created: 2020-06-16 17:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33a796f09d41f92cc0652a6fc2bceea7 SHA-1: 3c53d48001f9ea009b73f2a0052b9b0988e99d4b SHA-256: 0b0417fe3449f6dd6b9213bc35d978593f33df8aa9f4a835e93634fe68789266
164 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many of which appear to be part of a link farm designed to host malicious content. The presence of urgency language in the document body, combined with the high number of suspicious URLs, strongly suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further confirm its malicious nature, likely acting as a dropper for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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-9101384-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9101384-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mail.digitalsaintsdesign.com/uploads/1/3/2/3/132302794/132302794.html#cold+war+gone+hot+pdf
    • http://performancef.com/uploads/1/3/0/8/130874125/3303041.pdf
    • http://mail.lazarustrust.com/uploads/1/3/0/4/130435646/dirokemavetuwe.pdf
    • http://mx.carolinamountainreefs.com/uploads/1/3/0/5/130539926/5198241.pdf
    • http://mlaskowitz.com/uploads/1/3/0/2/130287727/4ce6fe23052254c.pdf
    • http://3800-3828hawthorn.com/uploads/1/3/1/4/131483068/vimuvesipazapu.pdf
    • http://fezz.dev.lry.com/uploads/1/3/1/4/131406800/d0022994.pdf
    • http://thehuntsman.us/uploads/1/3/0/2/130291939/lipavosu.pdf
    • http://dallaspremiermovers.com/uploads/1/3/0/4/130475959/xukomak.pdf
    • http://webdisk.midvest-pools.co.za/uploads/1/3/0/6/130603704/fe74c4a9e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a398.bin
dd2d0bbcf66897c4ad523f75d35854da08567581d76292f039b5d528771bb2ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA398 10832 bytes

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