Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e295e14b647d465…

MALICIOUS

PDF

43.6 KB Created: 2020-03-09 06:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7efeb1edafcd5559e9701705940fa48e SHA-1: c64031aadf20e110620c0c6045c8e883f09e4655 SHA-256: 1e295e14b647d4651251d5c5d4f7f29072714088e0b6c612773c501c29b5d284
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or a distribution network designed to obscure the ultimate malicious payload. The presence of the 'PDF_SEO_LINK_FARM' heuristic firing strongly supports this assessment. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact nature of the final payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://gq0j8.bpmtc.com/uploads/1/3/0/6/130604918/130604918.html#avengers+logo+full+hd+images PDF link annotation
    • http://www.ashleybae.com/uploads/1/3/0/4/130476162/e07167d00566d6.pdfIn PDF document text
    • http://scahistoricalsociety.com/uploads/1/3/0/7/130776542/4013566.pdfIn PDF document text
    • http://learn-live-grow.barrettsblog.net/uploads/1/3/0/6/130620693/73b8eb26d38.pdfIn PDF document text
    • http://rockfishdivers.com/uploads/1/3/0/6/130621470/fe2d9a26.pdfIn PDF document text
    • http://miralunacraniosacral.com/uploads/1/3/0/5/130588708/wikoned.pdfIn PDF document text
    • http://www.liveyourdream.ru/uploads/1/3/0/6/130620931/buvofejusibojibawaku.pdfIn PDF document text
    • http://bottlecan.biz/uploads/1/3/0/7/130775803/lunepajujeparo.pdfIn PDF document text
    • http://hostmaster.ubonpartners.com/uploads/1/3/0/7/130739227/8ecf55f01e4f8.pdfIn PDF document text
    • http://strategicanswer.com/uploads/1/3/0/8/130814682/3193322.pdfIn PDF document text
    • http://messinger-systems.com/uploads/1/3/0/6/130604630/3adf5.pdfIn PDF document text
    • http://shelleyortner.com/uploads/1/3/0/7/130775832/2d1f97bcac919d.pdfIn PDF document text
    • http://casemedicine.org/uploads/1/3/0/6/130639733/7806527.pdfIn PDF document text
    • http://trfmontpelier.com/uploads/1/3/0/6/130621164/5693418.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A93 8392 bytes
SHA-256: 98fa1b98b982e802451854db41c64d1ec36ceccb6b300586fdbc5d320828c018
font_01_sfnt_off00008b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B22 16340 bytes
SHA-256: 559dd9b85b110fca6602cd1e4ac3fa981b9684ef6491f63fc2cac816d372da27