Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa38fc2e26923db9…

MALICIOUS

PDF

37.5 KB Authoring application: ImageMagick
MD5: cdf1f5c55cc847976464fc1a1b694768 SHA-1: 3f6914299a7f0a8f0709a56a9e1cc33179c5ac43 SHA-256: fa38fc2e26923db977d3f76b661782c04242999406faf2609db6d9e4527eacd5
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document body, though partially corrupted, references a price list, which serves as a lure to encourage users to click the embedded malicious URLs.

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://woodenbrightness.com/uploads/1/3/0/7/130738696/2057092.pdf
    • http://mnemolyse.com/uploads/1/3/0/4/130476628/ebc755beb1d7eb.pdf
    • http://xevaxikusa.optomsahar.ru/uploads/2020/01/28/4895849.pdf
    • http://mixerfasr.weebly.com/uploads/1/3/0/4/130483886/tikevetazipuradisojo.pdf
    • http://geigerair.com/uploads/1/3/0/7/130740183/3512001.pdf
    • http://ndtasanantonio.org/uploads/1/3/0/6/130620367/130620367.html#abu+dhabi+duty+free+alcohol+price+list

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000105a.bin
57a03e4ae51cc0d14d40ad9116afaca149835706ab41a2f5bedb70a822eaf330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A 8052 bytes
font_01_sfnt_off00004b1f.bin
83609d20cc4f557dac6b89b741e14b544f07af36ee3d2ab56fe8d2a06827fb8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B1F 16256 bytes

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