Malicious PDF — malware analysis report

Static analysis result for SHA-256 69eb221f97fd5e3d…

MALICIOUS

PDF

37.0 KB Created: 2020-04-06 11:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7e98a9a78967a699f3510bf79715b702 SHA-1: fb842d726b13edd24399c613ad4b2190d703efc1 SHA-256: 69eb221f97fd5e3dd7d5ffbc5180ceaae267072577f1bee0364ca5f44260f59e
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, designed to direct users to download content. The document body and extracted URLs suggest a lure for downloading a book, which is a common tactic for distributing malware or leading users to malicious sites. The ML classifier strongly indicates maliciousness, supporting the assessment of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jrhomeservicesllc.net/uploads/1/3/0/6/130604758/130604758.html#quidditch+through+the+ages+book+download
    • http://kentskitchens.com/uploads/1/3/0/5/130550980/ac8d00d964f260f.pdf
    • http://cottoncache.net/uploads/1/3/0/9/130969441/fukira-jodutawaxixol-sugegakumilemo.pdf
    • http://dancbarber.com/uploads/1/3/0/4/130483396/b0f66b4.pdf
    • http://abettergoodbye.net/uploads/1/3/0/8/130813614/544f455e8.pdf
    • http://sydnieohm.com/uploads/1/3/0/5/130539244/fikekekixa.pdf
    • http://msjacques-purdysclassroom.com/uploads/1/3/0/6/130620796/8469198.pdf
    • http://assurance-realtor.com/uploads/1/3/0/6/130620755/e433cd856.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f5.bin
c012792d34c4ecd0b04b2182c41f72e06c61f2f8c04b92499cebb43c394f93c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 8656 bytes

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