Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ea88c31c56e38d…

MALICIOUS

PDF

123.7 KB Created: 2020-04-12 15:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1bd1a35afe323094e151fbc5bca3ae27 SHA-1: e11e98f3fa139be1f11cd3401524bd63ad241c8d SHA-256: 25ea88c31c56e38d4c944e4b25c9b25a4c0dfb7effc8f5d0746f5559087b05c0
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded external links, many of which point to domains that appear to be part of a link farm. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains a title that seems to be a lure. The primary attack pattern involves directing users to potentially malicious external sites through these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9855

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://yourlovedoneshome.com/uploads/1/3/0/4/130476192/130476192.html#midnight+summer+dream+characters+list
    • http://adam-butler.net/uploads/1/3/0/4/130483561/7497729.pdf
    • http://dottirsports.com/uploads/1/3/1/3/131380555/4558864.pdf
    • http://lpfx.net/uploads/1/3/0/2/130287957/gexomopewage.pdf
    • http://vislintelligence.com/uploads/1/3/0/6/130605299/5571524.pdf
    • http://cultivatechi.com/uploads/1/3/0/6/130639903/b4e5e04a6.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_off0001abd7.bin
632bed0cb373baa91f3747920b5cd610ef2b47dc0502ee466a4c7411e0de3309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABD7 9508 bytes
font_01_sfnt_off0001ce91.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE91 16036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.