Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e2164e78cfd0cb…

MALICIOUS

PDF

68.1 KB Created: 2020-12-27 22:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8fce7bb4cc593fff06eabad0ae29f165 SHA-1: 8c7e140e91f0345d3b300e752998364efb5bdbc4 SHA-256: 82e2164e78cfd0cb1f860eb2d9c2c6a16d8cd7d6cbad3c54fd88493fa25574c7
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classifier score and a ClamAV detection indicating it is malicious. It contains an embedded URI pointing to 'https://trafffi.ru/strik?utm_term=idle+tap+bowling', which is likely a phishing or malware distribution URL. The PDF structure and embedded content suggest it is designed to exploit vulnerabilities or trick users into visiting the malicious link.

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
  • 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://trafffi.ru/strik?utm_term=idle+tap+bowling PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5fa26a93acc07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5fcf6e6173629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5fa5c38440010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479675/normal_5fc0ad8bce4de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fca0adb421c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_5fd6628cdaa95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5f8f191359734.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387226/normal_5fc98a0b8b0b3.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/b5ffb5c3-5579-451c-918f-4c07ee971f7c/wizard_builds_ragnarok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e7ea42-79f7-4e72-b4b0-055546588517/25095540035.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/the_kidnapped_prince_the_life_of_olaudah_equiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796e22b3-f699-4b26-bc29-d47ac60fcf38/guided_bench_press_machine_bar_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/500_aptitude_questions.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_off0000cc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1C 5020 bytes
SHA-256: 0167c6beceb61e11dea17af253a7fd292312678843f9500b2d1b703dfafd188c
font_01_sfnt_off0000dd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 11140 bytes
SHA-256: 05b2e16bbb6cbb458d206f0d0a57affb913d1256a40e5eecc73016247ea89516