Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1b74762ee6be6e…

MALICIOUS

PDF

37.6 KB Authoring application: QPDF
MD5: e59ce6745d340dc2eb1f2749c045ca9b SHA-1: d35314764f14a9968a9e87216dea3f760cbac739 SHA-256: 9c1b74762ee6be6ea2e648d16f454873cf4e7b17d7a6e99d490c9dfe5350e457
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a traffic redirection mechanism. The embedded URLs are the primary indicators of compromise, likely leading to malicious content or further infection stages.

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://gufiva.achdziewczyny.site/uploads/2020/01/27/46ac5204.pdf
    • http://pamela-johnson.com/uploads/1/3/0/5/130590678/4bb790c8272e.pdf
    • http://kellyskorneronline.org/uploads/1/3/0/4/130488288/16833.pdf
    • http://mountaincreekresortrentals.com/uploads/1/3/0/4/130476065/rusedezo.pdf
    • http://kairosart.org/uploads/1/3/0/6/130621772/d833f474fb474a.pdf
    • http://autismcommunitynetwork.weebly.com/uploads/1/3/0/6/130622048/424722adea8d05d.pdf
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/3/130312929/130312929.html#loteria+del+abecedario+en+ingles+para+imprimir+gratis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000137c.bin
e1d873471619b53f8bee2b0ceb39e43dd850136c63039fdfcdcd392fb6e8c829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137C 9568 bytes

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