Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c90513f1467187f…

MALICIOUS

PDF

61.4 KB Created: 2020-12-11 07:25:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0212424579fb17c491b25b286f057ebe SHA-1: 2d57fb761f205ea023847d360f21ef8ba5ed94f0 SHA-256: 2c90513f1467187f530e26ed6265aac5f723ed7c334ded1a7b96afba6cd848b3
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit user interaction to visit a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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=world+religions+worksheet+pdf+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381997/normal_5f9e3931b1104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5fb58a6e9084a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5f9dfdd041e18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5fc3b0a0e6bf4.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/52b7ccc4-9aa3-4aac-8bf9-2236f4ed3043/assassins_creed_odyssey_standard_vs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc568ea-4486-4983-9fbf-2d6c7775c77e/petifebanavipiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc1ef08-bf6d-453f-8fff-d47dea8261ad/jonathan_dickinson_state_park_camping_fees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16721b22-f4d7-4d86-99f9-5d145d6dc756/myanmar_mp3_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3eb4ddb-6bfb-45c2-ab9f-8a8b3f47cfc8/74721129002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a0f7991-d438-4ef4-a884-3507a261cc14/cracking_the_pm_interview.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_off0000b435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB435 5472 bytes
SHA-256: 4aa1b217992f030410f4a788dda83985981704142830fa388ea7b7e8a91228d8
font_01_sfnt_off0000c6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E9 10212 bytes
SHA-256: 21665f3291aba89093d5501893c5b32033e7858cc7e45169926f62029480ccde