Malicious PDF — malware analysis report

Static analysis result for SHA-256 958410c7cf26edc4…

MALICIOUS

PDF

42.2 KB Created: 2020-11-05 21:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f0e839a2644221251de724872e8fd87f SHA-1: df5754bc5debdf1dd4cbebaa2019b3b15011f741 SHA-256: 958410c7cf26edc4cd0c8af8a02fe21564bb4898b97c42fbee507309ec45aa83
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://trafftec.ru/123?keyword=abishag+the+shunammite PDF link annotation
    • https://pixabetamomu.weebly.com/uploads/1/3/1/0/131070001/vitoxabupar-sepugopasu-rirel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444098/normal_5f9f3f25b7a0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f907f7435e79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5fa08b5b9b066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_5f9fbcf230eec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403561/normal_5f917bc1c7fec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5f9eefcd79b19.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/neserisibudopazas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5fa0d1a61ff32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f9829faf1512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizaxo/debussy_suite_bergamasque_prelude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8725f50b-76d6-4db4-aa61-83e3fe1f8d12/32837768417.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/redomudut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6cd5b5-b4c9-4aed-aa6b-d1d070cc04f3/boku_no_hero_academia_porn_comics.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/2731513589.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6433 5100 bytes
SHA-256: ddd2017f3cbc36773587cf6a2cc600995e1de64ca063c56f10f0e90ecf22848a
font_01_sfnt_off0000756c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756C 11280 bytes
SHA-256: 498c3c75d85faeab214e8d5e5d17280a989892a837179e51cd0a32282835caff