Malicious PDF — malware analysis report

Static analysis result for SHA-256 471d7ab5ef98973f…

MALICIOUS

PDF

34.0 KB Authoring application: Mobipocket Creator
MD5: c5106676173c4f8b2eaaf8f0dcfec3bd SHA-1: ce22e638e66802a16414fb25a99da52def97f48d SHA-256: 471d7ab5ef98973f57a22a3b5ed1db5109577d5738ec61f610dce7232b594794
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though partially corrupted, mentions 'Mobipocket Creator' and 'convert pdf into excel file', suggesting a lure to disguise the malicious nature of the 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://cassiescreations.com/uploads/1/3/0/4/130478484/tuzofarara-besafefixu-kaboboz.pdf
    • http://christhecopywriter.com.au/uploads/1/3/0/8/130813077/bapijukov.pdf
    • http://whyusehghgel.com/uploads/1/3/0/7/130738503/xawurorem.pdf
    • http://grannys-garden.com/uploads/1/3/0/5/130588936/7e3241ca.pdf
    • http://speechtherapy.biz/uploads/1/3/0/6/130620473/6455718.pdf
    • http://mta-sts.mail.hollywoodtemple.org/uploads/1/3/0/4/130489162/megisosozijogopu.pdf
    • http://mypopularfood.com/uploads/1/3/0/7/130739561/dd5ca91a21a.pdf
    • http://rootdesigns.net/uploads/1/3/0/6/130621447/21f6dff934caf6e.pdf
    • http://vigorouslandscapingandsnowremoval.net/uploads/1/3/0/6/130639220/gaxekosegal.pdf
    • http://advancedbuildingcenter.co/uploads/1/3/0/7/130739814/nawapa.pdf
    • http://reliantpayrollandbookkeeping.com/uploads/1/3/0/7/130775961/tuwodemamise.pdf
    • http://roxandsol.com/uploads/1/3/0/6/130621965/wozegefaxel_xovajegonun_talimij.pdf
    • http://guidemehomefoundation.net/uploads/1/3/0/8/130874320/130874320.html#online+convert+pdf+into+excel+file

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d34.bin
23ddb85f144bc1357398b74edeec2dc891f3ac78ac0170a6db824daef6110197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D34 7676 bytes

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