Malicious PDF — malware analysis report

Static analysis result for SHA-256 762a82b9a3a9fa96…

MALICIOUS

PDF

38.6 KB Authoring application: Poppler-utils
MD5: deb4ff829c2ee03f7928d702e36ff4bd SHA-1: 87f6b9f14057335dd9b11518733d1b396bb30eec SHA-256: 762a82b9a3a9fa9688f251df27b31b286fd666f1e71d2ec47b9a8b53bef01989
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical rule for a link farm and a machine learning classifier. The embedded URLs suggest a tactic to distribute content or manipulate search engine results. While no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://natedhill.com/uploads/1/3/0/3/130313082/6362624.pdf
    • http://r3healthandfitness.com/uploads/1/3/0/2/130271177/7810703.pdf
    • http://thevirtuallibrarian.com/uploads/1/3/0/2/130289632/477bd69a6b05.pdf
    • http://xaz.toschevikova.com/uploads/2020/01/28/3760221.pdf
    • http://sydneybuyandsell.com/uploads/1/3/0/6/130639081/4553772.pdf
    • http://eugeneylee.com/uploads/1/3/0/4/130489123/5efafd.pdf
    • http://capitolcouturepr.com/uploads/1/3/0/6/130621535/zarijo.pdf
    • http://northfieldpro.com/uploads/1/3/0/6/130605472/ccf610c84a1.pdf
    • http://tcsonline.net/uploads/1/3/0/7/130739720/130739720.html#eclipse+phase+2nd+edition+pdf
    • 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_off00001121.bin
bb2317b84b01336baf5b552c0fbf0a472ad9e97a9bfab3dd8cb92edce58984c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1121 7836 bytes
font_01_sfnt_off00004fd7.bin
32bdc4d24c5e1411dff6a7cb0e11b4db57f258f5f1aebd915c07bb0c4fe5be7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD7 16160 bytes

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