Malicious PDF — malware analysis report

Static analysis result for SHA-256 4505764689030121…

MALICIOUS

PDF

69.0 KB Created: 2020-12-22 23:57:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aec93f3f9b60af9002d3b30961752bda SHA-1: d6904d8645638737f2d23b09299660b194a66c18 SHA-256: 4505764689030121067f857fc7003f3db50acf6fbabe406f59dc71ed78e5a154
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 0.9997

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://traffset.ru/strik?utm_term=ea+games+real+racing+3+pc+download PDF link annotation
    • https://vususutuf.weebly.com/uploads/1/3/4/6/134634118/efa1ad5837d2b.pdfIn PDF document text
    • https://sapixokevabose.weebly.com/uploads/1/3/4/4/134498139/botunifaferura_zusakeludev_nomabu_fidig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_5f9369ceaf373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f8a959287970.pdfIn PDF document text
    • https://papizutexoda.weebly.com/uploads/1/3/0/9/130969148/06013b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/962b924e-b98c-497c-8119-a7c88dd67602/pinavoberavejuduzibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b38877-fbae-44e0-9d71-d5774a8c727c/13920670679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc6720bd-5be6-45dd-864d-17d641754230/18142619118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1398d5-0781-408a-b15a-0df84f7faddf/29908914347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64be22ab-fb68-450a-a8f7-0accb4674033/24001651317.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6a6ccb3e0f577147e423/1606380142204/15817294829.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_off0000cfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAE 5604 bytes
SHA-256: 4c4a9d7ea213a64828a18fb5c37ffa39b89db3ddc31b6890a1d5f9105cdb1d7a
font_01_sfnt_off0000e2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BC 10828 bytes
SHA-256: d7ba54312993c3a0f00a85d7454e7dbab8ba95505cdec91bae1a4acb116c7b51