Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ce9672698362c0…

MALICIOUS

PDF

112.8 KB Created: 2021-04-24 16:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7c3e23aa5d20b0245aba25dddcf81a24 SHA-1: 4b5f2f2cd7b5cc15029e642a6770063845ad934d SHA-256: 25ce9672698362c0869ab3abff91a552738fa99dd7fa2dc4e20102e226d9121c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://seumenha.ru/strik?utm_term=list+of+trig+identities', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'trig identities', aligning with a phishing pretext.

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://seumenha.ru/strik?utm_term=list+of+trig+identities PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374013/normal_5fe58db7359f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_603522df651d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426085/normal_5fed71764807e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496607/normal_5ff23ed17e1af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503787/normal_602a1be8b6401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425933/normal_6007f38ce6cfa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jelomasulavi.atwebpages.com/90766269171.pdfIn PDF document text
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_c1b7fa52163f4a5a853dacce4d11e359.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_c53f2011a1dc4fcebc6c92428d0084d3.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_a8647786b35442b1a3827bf0a760d155.pdf?index=trueIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/42978369314.pdfIn PDF document text
    • http://safodur.epizy.com/el_aprendizaje_activo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75e11f1-12ca-4626-93b6-983716a30ba4/wojadelapagavitobij.pdfIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_3f5196f14cfc427e8724d6f23c6a1ef9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c33359-2c70-433e-a2a4-dc72684c3c07/harry_potter_quiz_hardest_ever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11dc342b-0a08-4d7a-bb0e-62837de8839e/the_secrets_of_underground_medicine_free_download.pdfIn PDF document text
    • http://vebodunusugi.rf.gd/37453157004.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_d7fa5d338a6a4dd5aba0455f20480014.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16007 4772 bytes
SHA-256: a05712f7f210f3d570e00c81622cade9796e2cc3d0f406ccda184750b6e3becd
font_01_sfnt_off0001705a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1705A 12968 bytes
SHA-256: 9f0d34198209727c386f18f5c74f2fb36a611abde971e9ff67d08678797746e8
font_02_sfnt_off00019d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D1B 17028 bytes
SHA-256: fc457ce4b07e1b3906b02f29278dc2b1b6d8c20ec8fec47d6030347dbd5d1b32

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