Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9c7564092d2fd4…

MALICIOUS

PDF

43.2 KB Authoring application: Mobipocket Creator
MD5: f9c066b64106ce4ef802a84f2bc73bc1 SHA-1: 2a7d76b3e3dc5fda0fe8cb80ab39b8eb5f9cd6f9 SHA-256: 4d9c7564092d2fd460ed994ceade9f82c02d898a90ea347d1fe4eb07d4f9b80f
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The PDF contains a large number of embedded URLs pointing to external PDF files, indicating a link farm designed to distribute malicious content or redirect users to phishing sites. The document body contains garbled text and some URLs, but no clear instructions or lures were extracted.

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://peterandannemariehelms.com/uploads/1/3/0/5/130538950/3019964.pdf
    • http://mylifeinconchas.com/uploads/1/3/0/5/130588663/zawokipe_fusuzex_gukovevagegut.pdf
    • http://renmach.com/uploads/1/3/0/3/130379081/5146988.pdf
    • http://poshgroom.com/uploads/1/3/0/6/130620233/xapabav_jiwarivoxo.pdf
    • http://globalhealthhighschool.org/uploads/1/3/0/4/130476157/9dfc13c8f.pdf
    • http://squeezeapparel.com/uploads/1/3/0/6/130639251/6346005.pdf
    • http://smartpromoting.com/uploads/1/3/0/5/130590159/pivelazeretusoda.pdf
    • http://btravels.co.za/uploads/1/3/0/5/130539035/76000bb82a1a4.pdf
    • http://risewithonyx.com/uploads/1/3/0/4/130435937/61db7e1fb3b9.pdf
    • http://afhe.org.au/uploads/1/3/0/6/130620471/fofonokirigalidibak.pdf
    • http://poviwagiv.dsmodes.com/uploads/2020/01/29/situlemiwiboxom_bupejelukawajep.pdf
    • http://scubatribemaldives.com/uploads/1/3/0/6/130621542/130621542.html#what+foods+cause+heartburn+during+pregnancy

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012d0.bin
05a2e7369805746b94d2acdf99383d3c86490107c17c94275e846278f0b4285e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0 7708 bytes

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