Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b974959da93a783…

MALICIOUS

PDF

35.2 KB Authoring application: LibreOffice Draw
MD5: b752a2b0c9cd75dbe716d4886137a440 SHA-1: 292a7729b74c4c281eb91f19c1da9629f0d0ec47 SHA-256: 7b974959da93a7835f8f7764b933948dc31f668c5d2bcb8cac74cf03b487fd28
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to external PDF files, a technique often used to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful sites, likely as part of a phishing or malware delivery chain.

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://lsbdacademy.com/uploads/1/3/0/6/130604641/bibipodaxezunu.pdf
    • http://nyclegendsofstreetball.com/uploads/1/3/0/7/130775186/ramowun-bubisiwatonel-gajalibo.pdf
    • http://wut.loza.pro/uploads/2020/01/28/8619872.pdf
    • http://nupelicanparty.org/uploads/1/3/0/4/130476262/e9b24f9.pdf
    • http://church-playgroundequipment.com/uploads/1/3/0/4/130476481/bemetigutako.pdf
    • http://acceleratefacilities.com/uploads/1/3/0/4/130483276/sudova.pdf
    • http://remnantsbarbersho.org/uploads/1/3/0/6/130639335/130639335.html#sentence+errors+questions+and+answers+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000113c.bin
b1dfaf388c3bfa93119bb7e6ad521db64ba316049d142855391f79d80499c527		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113C 8500 bytes

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