Malicious PDF — malware analysis report

Static analysis result for SHA-256 7942f1b112cc483e…

MALICIOUS

PDF

44.7 KB Authoring application: Smallpdf Desktop
MD5: 25ba94d5dd2a5b799322a9862b0dcee6 SHA-1: 9998fb2ced3d5487463d16e4f3752b91bf75b432 SHA-256: 7942f1b112cc483e19a7c0fd7717d40d767d644c1140532a074559c7333128ba
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The critical PDF_SEO_LINK_FARM heuristic indicates the document contains a large number of external PDF links, suggesting it is designed to redirect users to potentially harmful content. The embedded URLs are likely part of this redirection scheme.

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://oakland-abyssinia-productions.com/uploads/1/3/0/2/130272232/9ff8cc9c.pdf
    • http://northwestclubracer.com/uploads/1/3/0/6/130621569/7cc8b531a81b.pdf
    • http://jinyu.us/uploads/1/3/0/5/130588841/fccd489dd68b31a.pdf
    • http://quartneibrown.com/uploads/1/3/0/5/130589186/cd2b4881e18f.pdf
    • http://draamasalo.com/uploads/1/3/0/6/130604585/logele-riwigowolu-vodasudut.pdf
    • http://orcajewelry.com/uploads/1/3/0/7/130739028/4565b.pdf
    • http://ideal-zdorovje.ru/uploads/2020/01/28/051263.pdf
    • http://thehappylifeacademy.com/uploads/1/3/0/5/130544584/xadafemidaxitok.pdf
    • http://11ange1s.com/uploads/1/3/0/4/130477890/zexosewavixita-pizazawe.pdf
    • http://troop115.com/uploads/1/3/0/2/130272925/130272925.html#asus+dip5+software

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013e7.bin
3877bf71d33de0ceaabbb226b6ff94388d33ce23757b013e4e391253a3d38eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7 9276 bytes

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