Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1876d2766e65ff…

MALICIOUS

PDF

74.1 KB Authoring application: PDF Studio
MD5: 1000fa9b89e77460564193ccd1e1764f SHA-1: 0afa61d99f63986886b7c3aa451e144d7fcb7f0c SHA-256: 9e1876d2766e65ff06a1c3bf5ee8ce88a02bd0c15ac6e8d960880ce18626fe29
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning and distributing malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further indicates a phishing or malware distribution intent. The document body, though malformed, suggests a lure related to a 'Larsen toubro annual report 18-19'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://dandeliontrade.com/uploads/1/3/0/6/130604838/foxad.pdf
    • http://cincobling.shop/uploads/1/3/0/3/130313755/fazuberiba.pdf
    • http://betutowi.makemone.su/uploads/2020/01/28/2003693.pdf
    • http://chelseachessclub.com/uploads/1/3/0/6/130603815/fonuzebuxiwab_xegarofenevab.pdf
    • http://id7me.net/uploads/2020/01/27/somebenoju.pdf
    • http://onestoneworks.com/uploads/1/3/0/5/130588405/kezanobijaxiveje.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/4/130436339/130436339.html#larsen+toubro+annual+report+18-+19

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013a5.bin
fada99777d23955b144e2424c910973572ec6c46ad46ffcc32d295f83fa5ec53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5 9692 bytes
font_01_sfnt_off0000c359.bin
d7302076f6fb4a4a0e5778c921fe6f0e385f287e3e71a9073d9ac42222df0098		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC359 9816 bytes
font_02_sfnt_off0000dd15.bin
32b54217619f9438721b423dc2f4f4da0f78781b0811ea49af2be6b0310ecf56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD15 16164 bytes

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