Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d06d6254bc8a4bb…

MALICIOUS

PDF

68.3 KB Created: 2020-11-26 16:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 12a4c2f5bd8cc05a19338dc4ec26810e SHA-1: 9d76a02ece446a6fbd289dd9e3339431ff9bf85b SHA-256: 2d06d6254bc8a4bbb5828b80e0112ec4257e04940ee07ef907bd075c4ab0bf68
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 identifying a 'PDF_SEO_LINK_FARM' suggesting a malicious intent to drive traffic. One of the primary external URIs, 'https://trafftec.ru/strik?utm_term=honors+chemistry+worksheet+solution+concentration', is suspicious. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=honors+chemistry+worksheet+solution+concentration PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5fa16f588ce92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496216/normal_5fb781c623c34.pdfIn PDF document text
    • https://wadagubabu.weebly.com/uploads/1/3/4/7/134709622/zepusudit-lirejegu.pdfIn PDF document text
    • https://vuloribogisoso.weebly.com/uploads/1/3/4/6/134655424/7684445.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/344cd2ad-3c9b-4918-a0f4-f91fc60de9f6/northwest_territory_lantern_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6418f9c4-fa34-439f-85c6-f8ba835c2d03/xajuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51bcfba1-a8b8-455b-805a-e92dbb6d2169/53556896858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1549f00e-ac8b-45b2-bc73-b958c9206830/79717526310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa3668f-6ee2-41d5-8c40-694e0d099efa/96314505129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a273775e-8280-4aa0-bcea-c04d7df341a3/watomemidomurig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e43c16-c39e-40ba-bccc-c3207d03012e/pokemon_heartgold_kanto_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cdf5a76-81ee-4ff4-9cbc-4abba13a19b2/ratalajumewo.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/fall_creek_junior_high_athletics.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/orbital_cellulitis_ppt_free.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_off0000cb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB09 5260 bytes
SHA-256: cc7be8d14f33c6d39bedf6a8f55a4e1d52b77e4e5ff12eeb981f081c8bca33e4
font_01_sfnt_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 12416 bytes
SHA-256: 502684123b01ce3606d4b66526156b30ae2da46a3f5e74768fa497281b66735e

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