Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a36174e4f2d8f92…

MALICIOUS

PDF

35.4 KB Authoring application: Mobipocket Creator
MD5: 453e4b41af400ec1ca003dd33e6066ee SHA-1: cfc68f70100905da48cf6b7cc7e1003158461b8b SHA-256: 8a36174e4f2d8f92064eb817ddd7bc68eba2c8ac664faeca605c8f405c26d946
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. No scripts were extracted from this sample, and the document body contained mostly garbled text, making it difficult to ascertain the exact lure.

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://amandawoodshall.com/uploads/1/3/0/5/130588475/28d5d.pdf
    • http://bmnfire.com/uploads/1/3/0/6/130604640/190169.pdf
    • http://tecladomusicinstitute.com/uploads/1/3/0/2/130272081/sororogapetujot.pdf
    • http://myneosystems.com/uploads/1/3/0/3/130379522/sukopatujifer-mamifigot-mosinujevax.pdf
    • http://babaanddada.com/uploads/1/3/0/4/130478520/651d36031b5.pdf
    • http://mhcustomhomes.com/uploads/1/3/0/3/130379517/bed453e5f4.pdf
    • http://gca-payroll.com/uploads/1/3/0/5/130588389/nojurebirigevuka.pdf
    • https://vewogusit.weebly.com/uploads/1/3/0/2/130289668/3180843.pdf
    • http://nulifa.proholidayphoto.com/uploads/2020/01/27/26db6d022d55.pdf
    • http://hillsborough-masjid.org/uploads/1/3/0/6/130604179/9259720.pdf
    • http://fribergfysikalske.com/uploads/1/3/0/3/130313247/4333da.pdf
    • http://gimme.site/uploads/1/3/0/2/130271161/d52fd624d.pdf
    • http://djspizza1.com/uploads/1/3/0/4/130493714/130493714.html#detroit+lions+injury+report+week+13

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012f9.bin
5f527d6c11af6eaa1224ef2afd2cdf13bb04bf7b0288f9140f72186a4b534ca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9 8384 bytes

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