Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42f6ae6ba22b340…

MALICIOUS

PDF

32.2 KB Authoring application: Adobe PDF Library 9.0
MD5: 0bd5fb6b13f0e9f9e960640e1fbf5184 SHA-1: d206c9a574c8edaaadd86a22cc858be2adf32834 SHA-256: c42f6ae6ba22b3408f533ef1bf18ce87d55b4153c6a6b8b21e9015f9168c9854
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and a machine learning classifier also flagged it with high confidence. The document body contains garbled text and references to 'Zkteco access control installation', which appears to be a lure.

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://vibecbdtest.com/uploads/1/3/0/5/130588297/68246394648b827.pdf
    • http://lafufuneg.trenirovka-pressa.ru/uploads/2020/01/28/6cd2e08e45.pdf
    • http://moderndaymira.com/uploads/1/3/0/7/130740368/wixigegevabo.pdf
    • http://investl.net/uploads/1/3/0/7/130739056/5933c00f.pdf
    • http://cosmicbabies.org/uploads/1/3/0/4/130488542/gumupuroleko.pdf
    • http://solit.studio/uploads/1/3/0/6/130620982/juwefavo.pdf
    • http://scarletexposurephotography.com/uploads/1/3/0/6/130621272/9744a3531fa41.pdf
    • http://wheelhouse.theater/uploads/1/3/0/5/130590243/xaligem.pdf
    • http://landmarkspreservation.net/uploads/1/3/0/5/130590583/mapirukevuki_muzuvobokevo.pdf
    • http://napervillegardenclub.com/uploads/1/3/0/7/130740550/7836688.pdf
    • http://meshayla.com/uploads/1/3/0/6/130639138/130639138.html#zkteco+access+control+installation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000126f.bin
4ff0c9d407ab0888a1564523c459c26077e1096a9d7569bc3316752e4a20f339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126F 7900 bytes

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