Malicious PDF — malware analysis report

Static analysis result for SHA-256 742541c854a37455…

MALICIOUS

PDF

75.3 KB Created: 2020-12-24 21:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 94f08f4897eb22e0803865f90189f726 SHA-1: 17a170e1252ec53421209a323386085a0b9ef40e SHA-256: 742541c854a37455f7437fe1fb88f781f1b0efa5429fae5f91321f7392cebae7
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. The primary link directs users to 'trafffe.ru', which is likely a malicious domain designed to distribute malware or facilitate phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafffe.ru/strik?utm_term=mod+zombie+gta+san+andreas+pc+download PDF link annotation
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/wesewodevirowo.pdfIn PDF document text
    • https://cdn.sqhk.co/xibumediw/RS8oaIK/45605340785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451544/normal_5fc56f439303f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f97111c4be3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_5faf2a87337e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_5fbd3f418f3ba.pdfIn PDF document text
    • https://dokipodaj.weebly.com/uploads/1/3/4/3/134306773/2787931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5fae00d63ca6a.pdfIn PDF document text
    • https://cdn.sqhk.co/pegebatanuz/gcGAghy/67698067923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f8b8ec990159.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/518f8dd0-477e-4fa1-936f-ad6fa4984f4d/varotezuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/134ae869-ba31-4205-a19e-1e107b0cf759/jesixumiwinudar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/345ad411-4dd1-46c8-8c56-e130f35b3769/kixazipozegoxewepipuj.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_off0000e7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DB 5680 bytes
SHA-256: 8dd62fb37432d8d95f83c7705bb462cb093819ba851f59588f5ce4c3837b89ba
font_01_sfnt_off0000fb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 11028 bytes
SHA-256: cf67f7c86dbc674ffb900a09ac77bb57b78def714133d28abd4aacb15582df11

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