Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cd4e92722fab24…

MALICIOUS

PDF

76.4 KB Created: 2020-12-27 16:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f5b390bfa81633a8b89b103b83ea0915 SHA-1: 5eccb99901425c272894b93f08a51ede35d88e95 SHA-256: 71cd4e92722fab24bddd0b4c5a8d95658daf6c5c25f6fd48e3cfdbeb4ae98f5b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/strik?utm_term=choppa+city+nba+youngboy+genius'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier and ClamAV detection further support the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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=choppa+city+nba+youngboy+genius In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f9240d3f30d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464851/normal_5fde496694216.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/iAjgSNn/62958006031.pdfIn PDF document text
    • https://cdn.sqhk.co/dokijesu/6hbNUgE/stickman_warriors_super_dragon_fight_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/gifitebona/mibgdPB/piwomemuduvubo.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/DpQwbha/33849085168.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://uploads.strikinglycdn.com/files/5f4878f6-b115-4b10-abe8-40d72b3ef69d/23940949468.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/google_drive_tri_fold_brochure_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deca3329-414c-4eb2-9d1f-f479f58c8b0f/sevizazub.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/retirement_planning_questionnaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4c4cb4-34af-4db5-be6d-e858f8c81c52/90262921548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f36d465-0269-4616-97e4-a1d8680f0393/pudab.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_off0000e1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DB 5212 bytes
SHA-256: 2640def8e0c743089168ec90a7ecc855006e9395c26c600e8f0d3d0513ec0a6f
font_01_sfnt_off0000f396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF396 10388 bytes
SHA-256: 8d9cf4efef080856d560e5a64223d854600a144e051b7e33da1974e2718ee78f
font_02_sfnt_off00011722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11722 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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