Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f019007bfc6ee3d…

MALICIOUS

PDF

64.8 KB Created: 2020-11-11 10:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3d848812417d9e0b38f5dc41a1415bc8 SHA-1: 1e440390260bbaf3e658e2045b6c86f427f4ad56 SHA-256: 3f019007bfc6ee3d68c3f39b62fa76b50679b910021bc7b8f5f2b48a4f385867
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'https://trafficel.ru/123?keyword=open+letter+the+amity+affliction+lyrics', which is likely used for phishing or to download a secondary payload. The document body, though heavily corrupted, suggests a lure related to song lyrics, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?keyword=open+letter+the+amity+affliction+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f973e8634f16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5fa462020fb13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424996/normal_5f9d4b047cc13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f9356f2b1f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_5f99d57c0b2dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daniwodug/robot_build_and_battle_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4121469e-1c98-4909-8027-25cf9dfc32d5/22750894392.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/google_sheets_importrange_limit.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/lisen.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/definition_of_early_childhood_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b662565a-e661-4618-82e5-72b39c71111e/baroromejobubik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327fc023-4aa1-4e12-b28e-91f61eecc1c2/domuletejisidibas.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/dfs_hawaii_job.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/14941707608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef600eee-0d56-4c17-9d6d-70e5d6bee4f4/sweet_potato_vine_plant.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_off0000c05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05C 5384 bytes
SHA-256: a55720116c0828cdde40e8794469b6c40ee98c0cc8d07dff7e8104d914e71622
font_01_sfnt_off0000d286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD286 10420 bytes
SHA-256: 16bad31f67408eaaa09a60c4f9fabbb30fece2bf1767c4f1c7be9389b2202188

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