Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54d771ccfb42bbe…

MALICIOUS

PDF

35.2 KB Authoring application: SWFTools
MD5: fe3a5f95af86481428732baef65b52b0 SHA-1: e56b847c1ef43429acc05663c608cc58eaa15463 SHA-256: a54d771ccfb42bbe5caa17f259102d2c46b30dee63b9eaf89d6b776e1a2b5155
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm designed to distribute malicious content or conduct phishing attacks. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the phishing classification. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious activity.

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://xaxuluk.trans-info.su/uploads/2020/01/28/lufalirajebezupowenu.pdf
    • http://laurenkwatson.com/uploads/1/3/0/5/130551362/1635871.pdf
    • http://med-impulse.ru/uploads/1/3/0/2/130288318/sozamo_mepilajujupaf_tokunumin.pdf
    • http://constructioninsurance.net/uploads/1/3/0/3/130379462/a0392079c.pdf
    • http://dreamamazingtravel.com/uploads/1/3/0/5/130540824/vamowebegedabax.pdf
    • http://freechoicelearning.org/uploads/1/3/0/5/130589442/wojivari.pdf
    • http://gejesidisa.davidnajaryan.com/uploads/2020/01/29/4954165.pdf
    • http://nobuhotelriyadh-fullsite.devsite-1.com/uploads/1/3/0/4/130477775/130477775.html#can+a+partnership+capital+account+go+negative

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011bc.bin
8c329231910bbeba93016de1a24b9eca73f5253d4276fc2fe2bb875f98f0ecf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC 8560 bytes

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