Malicious PDF — malware analysis report

Static analysis result for SHA-256 274baecc260d75bb…

MALICIOUS

PDF

71.2 KB Created: 2021-01-01 11:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 891c10f841d91388fac50db7e3d54653 SHA-1: d46a240f71447e6595b08d773d7ccab25a2baf1d SHA-256: 274baecc260d75bb5c42329899a77c99005a89b0d3ea22b07f4354417801ba8c
96 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=shopping+list+easy+and+simple
    • https://cdn.sqhk.co/nopawuwam/dEgdThf/84645757851.pdf
    • https://cdn.sqhk.co/pupevadojas/yWjcRTq/mutoxikozaguzedefidezo.pdf
    • https://cdn-cms.f-static.net/uploads/4475864/normal_5fb3cd06bbc6c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/fab278a3-a9e1-43b1-9879-0253b2d12d94/2002_nissan_xterra_manual_transmission_fluid_capacity.pdf
    • https://uploads.strikinglycdn.com/files/1d1918f6-7903-47eb-b1f5-b2eecf146cb2/paladin_leveling_guide_wotlk.pdf
    • https://uploads.strikinglycdn.com/files/be094f97-213a-4102-98fe-7ebe3874498a/82214302426.pdf
    • https://s3.amazonaws.com/petuzutemixuvod/best_android_version_2019.pdf
    • https://uploads.strikinglycdn.com/files/caef2882-7b95-455f-80ad-0df03e25ddbf/alex_ferguson_my_autobiography_download.pdf
    • https://uploads.strikinglycdn.com/files/b98cc870-470d-4628-8b0c-af98c894461f/tekavufivudokedaderixumo.pdf
    • https://uploads.strikinglycdn.com/files/22825cb9-a135-4995-a097-829e2ceebc6c/praise_you_in_this_storm_download.pdf
    • https://uploads.strikinglycdn.com/files/a2ad836b-366e-4f33-ba92-847b9e07eb2d/dream_league_soccer_2016_trke_spik.pdf
    • https://s3.amazonaws.com/towakog/function_notation_definition_mathematics.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb0e.bin
5865af78b94f8b923963163c418de16f52174591c20faee72f7228034ee39f78
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0E 5268 bytes
font_01_sfnt_off0000dccb.bin
678cabe9e0fdf49d8b20c2edecaa19ed9a774955a636b581334e7f11ef004064
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 10776 bytes
font_02_sfnt_off00010053.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x10053 4324 bytes