Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ee04b3cea0be3d…

MALICIOUS

PDF

42.3 KB Authoring application: GIMP
MD5: 39745f2feaac386e69b2b79038ad2697 SHA-1: 60f4c63d4d3bcc5fab6f94fa6983e87d85b5321a SHA-256: 32ee04b3cea0be3dad08775fd2f8d08cb57d36aead73fba08018ba0c5ed756be
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically identifying it as a phishing or redirection attempt. The document body, though malformed, contains references to "Molarity and dilutions worksheet answers" and includes the same URLs found in the heuristics, reinforcing the lure.

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://nahahillclimb.com/uploads/1/3/0/5/130590177/1158555.pdf
    • http://weekeepcompany.com/uploads/1/3/0/6/130639913/3f897bf36ec.pdf
    • http://summitcityguitartraining.com/uploads/1/3/0/4/130476112/56f64.pdf
    • http://olderusticfarmhouse.com/uploads/1/3/0/2/130272978/lutinafejoki.pdf
    • http://diagmal.eu/uploads/1/3/0/4/130436298/batujisiwejofijigi.pdf
    • http://myentouragemusic.com/uploads/1/3/0/6/130639653/130639653.html#molarity+and+dilutions+worksheet+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010cb.bin
90ccd17e35f49c416b735e429e72baff7ec16ce29c4a5e9b1180aba6e15ecf31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB 8616 bytes

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