Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e5dcff9d981a39…

MALICIOUS

PDF

38.5 KB Authoring application: Adobe PDF Library 9.0
MD5: de24e952a3f52090eff48b2bc2dae01c SHA-1: 9f0c804afbfd351d4482226de08994523b0d577e SHA-256: 65e5dcff9d981a39d4ed23bf6a2e6da92cf892ebe1ea8079d1ee17e96da6bd92
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing or SEO poisoning tactics. The embedded URLs are the primary indicators of compromise, likely leading to further malicious content or exploitation.

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://angellameanix.co/uploads/1/3/0/5/130590719/depedugap.pdf
    • http://nivaacademy.com/uploads/1/3/0/6/130620251/8233642.pdf
    • http://natalieunisexandbarbershop.com/uploads/1/3/0/4/130477090/2206597.pdf
    • http://newbusinessdevelopment.net/uploads/1/3/0/5/130588607/2687890.pdf
    • http://nof.newsvse.ru/uploads/2020/01/29/870166fbce.pdf
    • http://sharedtravel.voyagerwebsites.com/uploads/1/3/0/2/130287883/1b49abfd5739.pdf
    • http://gos.viptip.pro/uploads/2020/01/28/5298395.pdf
    • http://michaudwellness.com/uploads/1/3/0/4/130489351/130489351.html#wedding+flowers+png+free
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010fe.bin
91b012d72f517fbaef927cb7335450b6cdf5b4d9ba66a33e0da75ebeddd7ad8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE 7748 bytes
font_01_sfnt_off0000574a.bin
21c081c601f7a9d922326fd9cdb817eddda87ef78f5e69df0eeec30a56cc2ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574A 4324 bytes

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