Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdd44b86abafc17…

MALICIOUS

PDF

34.6 KB Authoring application: Serif PagePlus
MD5: d864818213b19460ce9fb137e9ebb06d SHA-1: f5c56a6570685564f2f81ffa1757428bf90fa863 SHA-256: ccdd44b86abafc17ec51bf69542397786b430962e567f7743995a5fd5ac67387
150 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple external PDF files, a common technique for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to educational worksheets. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://utile-it.com/uploads/1/3/0/7/130738921/7532f72181100.pdf
    • http://help-bank.ru/uploads/2020/01/28/2332495.pdf
    • http://zaigai.org/uploads/1/3/0/3/130379305/titujejafinuke_vufopa_vunezakujakarut_gidideruribin.pdf
    • http://miami.momotombochocolatefactory.com/uploads/1/3/0/3/130379172/130379172.html#cut+and+glue+worksheets+for+preschool

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fe7.bin
367604f06446fe0ce5f20f12220ad0bdb947765de845b9f7352868141b16a61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7 7792 bytes

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