Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdabdba4732cdf9…

MALICIOUS

PDF

38.6 KB Authoring application: Karbon
MD5: 36d13246b926b2c76169abc4534b3a5d SHA-1: 0e62833a40f7841e664edbaa40fae04b14d67de4 SHA-256: 6bdabdba4732cdf9c2211bd5c3016737f0d0bcf8835b0bece22c0a6d26975a8f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The critical PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded external links. These links likely serve to distribute additional malicious content or engage in SEO spam, as suggested by the URL patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://mrswatsonsroom.com/uploads/1/3/0/8/130815097/9364246.pdf
    • http://scimedart.com/uploads/1/3/0/6/130621101/914fecab7.pdf
    • http://mylaraonline.com/uploads/1/3/0/7/130776866/b6a0cc4.pdf
    • http://cbdforbullys.com/uploads/1/3/0/4/130476172/84fec58.pdf
    • http://nmswrites.com/uploads/1/3/0/4/130488073/bokojoxe_wozisenisowa_vetag_kalekotupo.pdf
    • http://centerforpentecostalministry.com/uploads/1/3/0/6/130640060/9305194.pdf
    • http://brucedaleestate.com/uploads/1/3/0/6/130639292/9698205.pdf
    • http://shardexplorers.com/uploads/1/3/0/6/130605036/130605036.html#ethylene+glycol+monomethyl+ether

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004152.bin
cf1fe3b006971e605093fea73842b09cf60046cb24731e35db17d9772711ab04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4152 8996 bytes

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