Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee9292372259d72…

MALICIOUS

PDF

69.4 KB Created: 2020-11-13 03:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cc30ac57d5156c28bdd304f5105db4e3 SHA-1: 112fc2f2610e7afaa7b9cafb1a5083454c38ebff SHA-256: 8ee9292372259d7205592b417813f4a6c53a88084d712ea3d2cfcf8a33d36a89
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://traffking.ru/strik?utm_term=apprendre+la+langue+francaise+pdf PDF link annotation
    • https://xekexudaxojow.weebly.com/uploads/1/3/4/3/134365032/9b37d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5f97e3918d641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5f9b3d24cd40c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5f962e4f26c62.pdfIn PDF document text
    • https://sezitekiporav.weebly.com/uploads/1/3/4/6/134627959/38be3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_5f9840ff4428f.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/a1e09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5fa1913791afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5f9896193d325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f8a467facfcd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fajixe/world_of_tanks_console_xbox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CF 5004 bytes
SHA-256: 0bd9f0544e2177e3f3713a05909536a162ed24aeef7db4d01217f7fc30cba1fa
font_01_sfnt_off0000d2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D4 12060 bytes
SHA-256: 6ad001660687f9890c8d97bb079632a96835318f2a0352daa98ed92fe5c5dae7
font_02_sfnt_off0000f984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF984 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f