Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef51ecb0051cc1e…

MALICIOUS

PDF

76.4 KB Created: 2020-04-03 16:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 46350f00a5ae61af33a85cd09703dbfc SHA-1: c1dde96c871e3f142e977ee1e3ac4619d0957031 SHA-256: 5ef51ecb0051cc1e2d4b348bd65bfff76411ddc90c780e3f0f804ba6d27131ff
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body text, though partially obfuscated, includes a URL that appears to be a lure for a "green voter guide". The presence of a PDF link farm and the ML classifier's high confidence score indicate malicious intent, likely to distribute malware or redirect users to malicious sites.

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://grupoforrajeroxalos.net/uploads/1/3/0/5/130550971/130550971.html#green+voter+guide+california
    • http://kateluvsbeauty.com/uploads/1/3/0/3/130379386/pugitineza.pdf
    • http://michaelgaal.com/uploads/1/3/1/3/131381677/2cdada0fff.pdf
    • http://giftideasforall.net/uploads/1/3/1/4/131408099/6667890.pdf
    • http://beckataylor.com/uploads/1/3/0/3/130323178/teres.pdf
    • http://evironmentalcampprogramplanningguide.com/uploads/1/3/0/4/130435813/tasivax-xosovuxula.pdf
    • http://sncdesignweaving.com/uploads/1/3/0/8/130813732/waxoridi-niwezavit-kofufox.pdf
    • http://rowlisonart.com/uploads/1/3/0/6/130620684/1152862.pdf
    • http://fixersinalgarve.com/uploads/1/3/0/6/130604251/tusaki.pdf
    • http://mx.syrenkastudios.com/uploads/1/3/0/4/130435590/gifowurepego.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_off00010757.bin
37f80463c7c9e5031f8bada769d701ed515696e21fa27ca783724bfe9e31cc47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10757 7540 bytes

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