Malicious PDF — malware analysis report

Static analysis result for SHA-256 785db72392772252…

MALICIOUS

PDF

40.5 KB Created: 2020-05-25 14:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47b189a70c4be74383d9ad71aba65799 SHA-1: c0fa6dd231c5286d0d6e91f401cb60de6ced6047 SHA-256: 785db7239277225204270c7a43344484b4c01f7c7dc881823bc7ee58e83f86d6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by an ML classifier and contains numerous external links, indicative of a link farm or redirection scheme. The document body contains obfuscated text and references to external URLs, suggesting an attempt to direct users to potentially harmful content or further stages of an attack. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://petersonchapelmbc.gammaxiques.org/uploads/1/3/1/4/131453194/131453194.html#nir+eyal+hooked
    • http://exploreintheusa.com/uploads/1/3/1/3/131383652/3021893.pdf
    • http://cesservices.info/uploads/1/3/0/7/130776083/bobuvo_ligozibabaxegeb_tixelu_jetek.pdf
    • http://leighlennon.com/uploads/1/3/0/8/130874088/noxan.pdf
    • http://thefellowmanlegacy.org/uploads/1/3/0/3/130379361/5646677.pdf
    • http://lifestyleshop.nl/uploads/1/3/1/4/131437493/pevejex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f31.bin
4d0a9ab2f628263c890b31383d43f8770bd488f50f7ea89bcff84ac39a8413de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F31 10096 bytes
font_01_sfnt_off00008209.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8209 16204 bytes

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