Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab72f5aee3839ac…

MALICIOUS

PDF

38.8 KB Authoring application: Mobipocket Creator
MD5: 06b1a9de83be2546d66af11fd13e4d78 SHA-1: 5b9514909c91501cc140e81ca854614981cc7ec8 SHA-256: cab72f5aee3839ac4e3ac45919999f14b2b89d0f733312046ee66e1e51a0234b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing or traffic redirection. The document body content, while seemingly innocuous, is likely a lure to disguise the malicious nature of the embedded links.

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://message6666.com/uploads/1/3/0/8/130813536/rigepuxojego.pdf
    • http://humanisingtheenterprise.com/uploads/1/3/0/7/130738541/8506760.pdf
    • http://mmccolorado.online/uploads/1/3/0/3/130323674/nugefuxudoj.pdf
    • http://www.officialajgen20192020.com/uploads/1/3/0/9/130969356/susupa-vokoxolof-nevuxuxe-sudijuje.pdf
    • http://karasholtz.net/uploads/1/3/0/7/130775294/dagixofiwazi.pdf
    • http://farmersmarketdog.com/uploads/1/3/0/5/130551219/vokalepimiwo.pdf
    • http://rosegold.club/uploads/1/3/0/2/130289338/juniwunaloz.pdf
    • http://mta-sts.mail.gigiguthrie.com/uploads/1/3/0/8/130813063/fujagofa.pdf
    • http://mail.faithbiblecamp.com/uploads/1/3/0/7/130738830/d601601d2432.pdf
    • http://joannajensen.shop/uploads/1/3/0/8/130814329/8641377.pdf
    • http://nateazrin.com/uploads/1/3/0/3/130323291/jofonega.pdf
    • http://mx.greatbearbuilders.com/uploads/1/3/0/6/130604716/lokoro.pdf
    • http://mentoringfutureleaders.com/uploads/1/3/0/5/130544390/daf0fd6a6abdd89.pdf
    • http://thelagraygroup.com/uploads/1/3/0/3/130379814/130379814.html#amigurumi+crochet+doll+tutorial

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003319.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3319 2616 bytes
font_01_sfnt_off00003ebe.bin
7d41d9af5e35737198e26fda2ba27cbd4f61fc897bd6d2caaf2ffd43deb57d48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3EBE 7840 bytes

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