Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf6d1799f857f6d…

MALICIOUS

PDF

35.5 KB Authoring application: Pdftk
MD5: da30f7577355ea24485b93f2ff3fd847 SHA-1: de4547a26babf801aee5c62226b8fadaab5d1976 SHA-256: baf6d1799f857f6d7f441c7f47ffd7913269ef48e334466688e52b21013a0ab1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing or traffic-robot-install type. The embedded URLs likely lead to further malicious content or phishing sites, aiming to deceive the user.

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://scoresgrill.ca/uploads/1/3/0/6/130603867/lemireforakoz.pdf
    • http://trucarelawns.com/uploads/1/3/0/3/130323319/xusibe_pisifej_fifesabute.pdf
    • http://nutrizionistagiuliaporcu.it/uploads/1/3/0/5/130540714/sunofit-nexejodozuwib-lotixilipusima.pdf
    • http://fikrinisenyonet.com/uploads/1/3/0/7/130775519/7308755.pdf
    • http://shilor.com/uploads/1/3/0/7/130738719/zewag-dibadegexo-kikutugozorura-guzabajovisudi.pdf
    • http://phhlca.org/uploads/1/3/0/2/130270777/8970779.pdf
    • http://nationalriskmanagementgroup.com/uploads/1/3/0/2/130272233/130272233.html#html+5+tags+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001161.bin
10b7ba73fc3a8ff5b9aa2434bc8d64f692a5dec7fd07fcec16a6acf9b37c5d48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1161 8524 bytes

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