Malicious PDF — malware analysis report

Static analysis result for SHA-256 665c12932481749a…

MALICIOUS

PDF

33.9 KB Authoring application: GIMP
MD5: bbb68c7b91dbd0dde1a341786c0bff95 SHA-1: 79962e8640d58b1fb70d9c56ea048d692b90f11c SHA-256: 665c12932481749a0728258693bda50ab17d0ade2355faf8ad957deb2c8b6b92
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted across multiple domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to URLs that are also listed in the extracted URLs. This suggests a coordinated effort to redirect users to a network of potentially malicious content, possibly for SEO spam or to host further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://tzaddi.net/uploads/1/3/0/6/130621998/sunewimub.pdf
    • http://mikewilbanks.com/uploads/1/3/0/6/130640110/biwaxipafopi.pdf
    • http://purespirithealingandwellness.com/uploads/1/3/0/6/130639285/6559608.pdf
    • http://bakedbounties.com/uploads/1/3/0/4/130483875/xixemujupuvunovuda.pdf
    • http://dlgicefactory.com/uploads/1/3/0/2/130287839/38ca065bb86bf.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/7/130776249/130776249.html#nhsn+cauti+worksheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001082.bin
11f9cbf1c1ee54936b4e0c58d7f5d9f41547f704551e2462089f0cc6a657ed6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1082 8236 bytes
font_01_sfnt_off0000493f.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x493F 2600 bytes

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