Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0c392af70f9f58…

MALICIOUS

PDF

45.3 KB Authoring application: Karbon
MD5: de2b318bc577853fc678bcc53c2be7e7 SHA-1: 161e8fc3ea030eda1b11e828115f918d297b67c3 SHA-256: 7b0c392af70f9f58a1b72a3d4b88027079d9a1ee007db8d1ab110307f81f9616
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The critical PDF_SEO_LINK_FARM heuristic indicates a large number of embedded external links, suggesting a link farm or redirection scheme. The document body contains a mix of seemingly benign text and embedded URLs, further supporting the attack pattern of redirecting users to potentially malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mwvhc-nh.org/uploads/1/3/0/6/130605076/5598213.pdf
    • http://visual-career-guides.com/uploads/1/3/0/6/130603895/3519797.pdf
    • http://petsitteratlarge.com/uploads/1/3/0/6/130621179/filidolarokojajipar.pdf
    • http://alwoc.org/uploads/1/3/0/6/130604606/89779e0.pdf
    • http://ellijayhideaway.com/uploads/1/3/0/2/130287307/6035205.pdf
    • http://radarx.org/uploads/1/3/0/6/130621946/tefajevonidonas.pdf
    • http://australiandiamondssports.com/uploads/1/3/0/5/130588349/a66d1dc9c38f.pdf
    • http://nancyandersonmarketing.com/uploads/1/3/0/5/130589328/robepekutule.pdf
    • http://microtiasurgery.net/uploads/1/3/0/6/130621642/nirewisogolujosusufo.pdf
    • http://nicolitulk.com.au/uploads/1/3/0/5/130588943/130588943.html#einaudi+sheet+music+una+mattina
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000122c.bin
1f37a9e46bd8ad61f5f4f342bd3d5ea894894a803b4e5c830d1ea2685bb25b8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122C 10288 bytes
font_01_sfnt_off00006cc4.bin
669a22844ddb84b64a1d93eb6147c2b8b7ca76f4316fe4be2bbf69c96252e72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC4 16180 bytes

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