Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ff6098398b3735…

MALICIOUS

PDF

46.1 KB Created: 2020-04-11 20:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a9aa8a078b32ef0a9b76b7044b13979c SHA-1: ade74f22d1b0cc81927f273565b832a4dd1222c4 SHA-256: 12ff6098398b3735e8e57095abb8476904613b2239ff8a8ade26436bae29a4c6
136 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, indicating it hosts a large number of external links. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, suggesting it was generated programmatically. The presence of numerous PDF links points towards a tactic to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://thecrossbarcollective.com/uploads/1/3/0/5/130545557/130545557.html#ejemplo+de+un+elevator+pitch
    • http://mopheads.org/uploads/1/3/0/9/130969871/farijafazifagujulufo.pdf
    • http://artgallerytrailwnc.org/uploads/1/3/0/8/130813604/65bb8d.pdf
    • http://mynkylc.com/uploads/1/3/1/4/131482874/558ea703735d8.pdf
    • http://samuellevylutcf.com/uploads/1/3/0/5/130542972/nikibegul.pdf
    • http://insearchofmaud.com/uploads/1/3/0/3/130313049/4751020.pdf
    • http://womanempowered.com/uploads/1/3/0/3/130313531/dubiluwebuki.pdf
    • http://risingsunsbasketball.org/uploads/1/3/1/0/131070309/lofojefugomuzenasep.pdf
    • http://jvrealtyconsultinggroup.com/uploads/1/3/0/8/130814717/2796429.pdf
    • http://paulrogge.com/uploads/1/3/1/4/131409009/3418944.pdf
    • http://reahomesllc.net/uploads/1/3/0/7/130775271/pumob.pdf
    • http://perspectivesbyjhw.com/uploads/1/3/0/8/130814510/jimonobevawub-raranaki-soripu.pdf
    • http://photoclubofquailcreek.org/uploads/1/3/0/8/130873856/pifuporepuledodut.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_off000088c5.bin
0617d97f21a858ea7a88c4d835e2d97e670bd7aa171fa7f58ca365067ab2b6f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C5 9528 bytes

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