Malicious PDF — malware analysis report

Static analysis result for SHA-256 42678954a6fd1f6c…

MALICIOUS

PDF

35.2 KB Authoring application: GIMP
MD5: bf97875e71334471ca24570594fa4339 SHA-1: 3c6530990b0421913d840fedd047e0ae988d1968 SHA-256: 42678954a6fd1f6c77668317930580985f3f6c2adcf421187c289ca6f27f3139
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The PDF_SEO_LINK_FARM heuristic fired, identifying a large number of external links embedded within the document. These links likely serve to redirect users to malicious websites or for SEO spam purposes. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather as a container for the malicious links.

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://miriamdavies.com/uploads/1/3/0/4/130483830/8053766.pdf
    • http://newlegendpictures.net/uploads/1/3/0/4/130478935/nejogu.pdf
    • http://pvcdesignz.com/uploads/1/3/0/6/130620650/miboxisikerufo.pdf
    • http://newhavenbooksellers.com/uploads/1/3/0/3/130323996/97f97.pdf
    • http://adentarussia.com/uploads/1/3/0/5/130542953/7321a2f264721d4.pdf
    • http://bgspecancandy.com/uploads/1/3/0/6/130621043/dofozasizanolo-zanalinetun-mazopasana-texavumo.pdf
    • http://carpetcleancary.com/uploads/1/3/0/7/130739711/130739711.html#crystal+report+for+visual+studio+2019+community

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001131.bin
b37c0bcd0116380a36bec6f6d6328524c2e8d2058e2f0e90e53291a5dc87fe09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131 8336 bytes

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