Malicious PDF — malware analysis report

Static analysis result for SHA-256 220edbf629828db6…

MALICIOUS

PDF

74.7 KB Created: 2020-12-17 14:59:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2a8455e7d9f50c1f82477dfff7dfaaa4 SHA-1: 4428f460dc9fa5494538d67452707540a77debcf SHA-256: 220edbf629828db607ca9c4b553f12cb8510675c07df4348d91f506f66d179b8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic flagging it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'traffset.ru', a domain often associated with malicious redirects or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=end+of+statement+expected+python PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380705/normal_5fce38a50b3e0.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/vabuwuzu-kodunukufamog.pdfIn PDF document text
    • https://pedutiwoda.weebly.com/uploads/1/3/4/4/134481784/kipemubog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_5fb45d2564866.pdfIn PDF document text
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/vofugikedenud-fumatanumanipiz.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/boxalewijim/xuvidil.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/plano_7771-01_guide_series_tackle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb667370-9615-4e38-8ae2-39c32d431e9b/18759468899.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/10061437938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094e9e78-c46e-4fe4-8a4a-6ee730bed5aa/vewufiridud.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/taiko_no_tatsujin_web_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596b863f-74fc-4ea9-9f1f-29f7518360e6/death_valley_photography_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/festival_avignon_off_2019.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_off0000d8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DB 5132 bytes
SHA-256: ceea10ee9c96422efcecae311aea308da3dadce46257bfec4e15095cab511d0e
font_01_sfnt_off0000ea35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA35 11048 bytes
SHA-256: 0c8794fe47e8a3761e5afc287a9f1e024d752e0080e6e0284136cc134a051d96
font_02_sfnt_off00010fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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