Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57c41e8e272bf40…

MALICIOUS

PDF

32.2 KB Created: 2020-06-25 01:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d31e2ad3c1b089d5d70a0384fdff51 SHA-1: af5c2d4256396b0944f134cedf615ab962224551 SHA-256: b57c41e8e272bf402b5fdb638e13da6254e75130e9e103031d5833f3bc227cfc
92 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to other PDF files. The document body mentions 'Zed pro guide', suggesting a lure for users to click on these links. The ML classifier strongly flagged this PDF as malicious, and the presence of a large number of external links indicates a potential distribution or phishing campaign.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dreamhere.org/uploads/1/3/0/2/130289172/130289172.html#zed+pro+guide
    • http://marlindivecenter.com/uploads/1/3/0/3/130323301/nutegoxe.pdf
    • http://intriguingscreens.com/uploads/1/3/0/5/130543600/wususibewe.pdf
    • http://decaturchorus.com/uploads/1/3/1/4/131454272/waxamekikode_fevunupubebum_sumita_lixefebidege.pdf
    • http://universalsoildrilling.com/uploads/1/3/1/3/131398006/5297017.pdf
    • http://altermagazine.org/uploads/1/3/1/4/131408984/rerunozojidesap-tulaxiwuxofe-migasawadiloju.pdf
    • http://gaiafloralart.com/uploads/1/3/0/5/130539897/kafonofikabamosij.pdf
    • http://morningswithamissionary.com/uploads/1/3/0/8/130873923/7124479.pdf
    • http://bbt.network/uploads/1/3/0/9/130969830/17069e18d.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046f8.bin
cb7719435483a2fd04815f85631c83dc733dc1da7c061ae4ff0d57c78acd9b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46F8 4360 bytes
font_01_sfnt_off000055d5.bin
706c69a32a9aac00694122405214cc4df496fd5d9f84cc17a1eeb2777a805331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D5 9232 bytes

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