Malicious PDF — malware analysis report

Static analysis result for SHA-256 4beaa9e99311dba9…

MALICIOUS

PDF

97.9 KB Created: 2021-05-27 07:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fe7719248b43b0c2eeb8a410698b2d79 SHA-1: eb4df017966f975caaa34c7e72471320a1740cb7 SHA-256: 4beaa9e99311dba97db1e831c76305dc3892ccf4ea3593cd1e3a0fdc49aa8e61
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI and the overall malicious verdict strongly suggest a phishing or credential harvesting attempt.

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://leonvi.ru/strik?utm_term=what+are+the+characteristics+of+good+or+useful+information+ais PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384632/normal_5febc1ba53a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_60650a963bab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_60608e85cd112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480408/normal_6064378e0be1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_6055743ac0df3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_604cd457a750d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464327/normal_5fd196d4a604f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_60172e259c3ea.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/a4140850-d776-45bc-bcaf-15668b6ecc09/pusiwazaxexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229e3940-1e3d-4af2-920c-34d2edd5ca6e/75783713422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5340d8ae-fb7e-414b-99e7-7deb951f726a/cuantos_litros_en_un_metro_cubico_de_agua.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/768211e4-c9d1-4678-8b51-e85595b783f3/nofajibajiroriburunum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e1cd9d-d607-4bc5-bd52-3312ebbed9bb/72810643178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/083f929c-4a84-4acc-8df3-092ca1f9a992/best_portable_dvd_player_with_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d8f57db-1416-4d0b-9b35-2b7b9001a7d7/tunovewizovosasasodijex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0025a4e-4a5d-454a-abd5-953bfac9cd92/82068659295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a93b2c-707d-4301-8295-dd0343f5d472/2018_toyota_camry_se_for_sale_by_owner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4283afc-c39d-48c9-8d47-b2b51c81abef/67664850705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973332ad-77a0-4d9e-8ac3-d761be644d7d/enriques_journey_summary_chapter_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6de02bb-a327-4532-93d6-f041b353a3ee/satoraruxovabolujoze.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_off00014288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14288 5448 bytes
SHA-256: 1345b7ace8b7e76e074a932fc366335eaba5bcf38c6c6a0bb549fb4fe79f6883
font_01_sfnt_off000154f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154F3 10872 bytes
SHA-256: 72f1f12c0af53a5d3558f8356299aae9abc6ed06bc9a8b474bfdb0e65b4ec490

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