Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e9cec32294c193…

MALICIOUS

PDF

37.3 KB Created: 2020-05-21 00:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e766c7c88ea56db00487c3200a2d5919 SHA-1: 6a64c259b3b7e39ef1c8cb7dbe1323fc100c3fd4 SHA-256: 04e9cec32294c19344ef50f88247ca3cff8eebe0f870f5c717b8881fe8a83557
96 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs disguised as a Pokemon ROM download, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to redirect users to potentially harmful sites. No scripts were extracted, but the presence of multiple suspicious URLs points to a likely attempt to lead the user to a malicious second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://insureapplewatch.com/uploads/1/3/0/2/130287537/130287537.html#pokemon+amarillo+rom+espa%25C3%25B1ol+descargar
    • http://vowsweddingdresses.com/uploads/1/3/1/6/131636807/2420f.pdf
    • http://industryvirtualtours.com/uploads/1/3/0/7/130739046/faa023b051ab15e.pdf
    • http://nickersonenterprises.net/uploads/1/3/0/4/130483520/zuzuluwomevux-nufapozodaru-muxominufof.pdf
    • http://sbcsjn.com/uploads/1/3/0/7/130738550/4dd495bcd8e181.pdf
    • http://joyahcreations.com/uploads/1/3/0/7/130739419/mavuxijit.pdf
    • http://blackhistoryinthemaking.com/uploads/1/3/0/6/130604521/2479788.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000638b.bin
c6dd5a3077ff47cc4f6c3ec3cc7a1edbe501644eb82fca214c687e44b310f60b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638B 11276 bytes

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