Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb1cea873439ed7…

MALICIOUS

PDF

38.1 KB Authoring application: Solid Converter PDF
MD5: 39b63cede599ab9194d2e0929a118e69 SHA-1: d03228602b4de11252fec97bede650da797b40da SHA-256: 8fb1cea873439ed74e75d1e1520de9f87dc2428aed4898d01bc26d5b63b7b941
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common technique for SEO poisoning and phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs likely serve as lures to redirect users to malicious websites for credential harvesting or malware distribution.

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 https://xesewikilul.weebly.com/uploads/1/3/0/3/130313426/bokagububalalize.pdf
    • http://technolojix.com/uploads/2020/01/28/kemitixenose.pdf
    • http://wifitokov.cityglush3.icu/uploads/2020/01/28/kidirot_nunuj_jojupatig.pdf
    • http://millennialstitcher.com/uploads/1/3/0/4/130489351/9498360.pdf
    • https://kisafakawepa.weebly.com/uploads/1/3/0/4/130435582/winub.pdf
    • http://fcalynn.org/uploads/1/3/0/3/130324390/7621894.pdf
    • http://torontogreekdj.com/uploads/1/3/0/3/130312969/fubori_xigibapof_fugivaxivuke.pdf
    • http://alessertraveledroad.com/uploads/1/3/0/5/130550973/673034.pdf
    • http://mikeintucson.com/uploads/1/3/0/6/130603809/130603809.html#blocking+calls+on+motorola+android

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011eb.bin
fb5df7904bf8702a7580bec738bd1002205100aaab3c03ebdde4a7139ce07f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB 8588 bytes

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