Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4f5ba27f8694a6…

MALICIOUS

PDF

81.5 KB Created: 2021-04-05 02:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0841174670c25c139406be28e92e3fe4 SHA-1: 7352c883a6b668b62da115b09ed0c0a79ff08c49 SHA-256: 2b4f5ba27f8694a6268df3c6b18bb042e94634f2449f192e0eebcc41b2298ab6
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests it is presented as a PDF file, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=acronyms+examples+pdf
    • https://cdn.sqhk.co/kupuvikadob/zchhhjZ/the_communist_manifesto_answers.pdf
    • http://sayseedokg.com/quantum_field_theory_energy_definitionjyjok.pdf
    • http://matteset-spon.space/kujapujula07pr.pdf
    • http://yoga-italy.space/dijokidapunupofitifakavieki26.pdf
    • http://keepqifi.site/4106849193ogr9j.pdf
    • https://cdn.sqhk.co/raserijene/jgjePjf/nippon_lanka_rechargeable_fan.pdf
    • https://cdn.sqhk.co/ruxuzobisu/gfgdkjg/silimu.pdf
    • http://zespodsvetkoy.site/dajesuvowenezapibips1gn.pdf
    • http://saudiautoinsurance.com/ford_mustang_owners_manualr3mja.pdf
    • http://hurleyshamburgers.com/55196286484mvzyp.pdf
    • http://gvidilon.ru/courtly_airs_and_dances_all_movementskkzqo.pdf
    • https://cdn.sqhk.co/pasezateda/b1ZhiPM/92101011121.pdf
    • http://copyright-supporthelp.com/gokekifimo7kwcw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_3924385e88ea4778abe8ddaa1935a9d4.pdf?index=true
    • https://s3.amazonaws.com/vokeri/enterobacter_cloacae_treatment_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/20c262da-011e-4e8d-b3be-3e36cc869dbc/reading_comprehension_questions_bookmark.pdf
    • https://s3.amazonaws.com/pezofut/logo_quiz_level_19_answers_by_bubble.pdf
    • https://s3.amazonaws.com/legipalofi/champ_cash_apk_free.pdf
    • https://uploads.strikinglycdn.com/files/d12432c9-00f1-4c73-a3c0-62783e88617d/24627770455.pdf
    • https://s3.amazonaws.com/bejenosugede/order_of_marvel_movies_to_watch_before_avengers_endgame.pdf
    • https://uploads.strikinglycdn.com/files/1482f187-2401-4e54-87ed-89032b3d237a/najunokoforukatozuz.pdf
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_1abc2f2479a7476b900cee8224d93217.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010075.bin
dbbe3d291d6aa7058294c7f689dd56951499baeca2d2d94d72c0b8b030d93577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 5460 bytes
font_01_sfnt_off000112fe.bin
0d577c56e5a554d5d0b443ebb42252a3308b1afb423d4d630478b7f7521104a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112FE 11056 bytes

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