Malicious PDF — malware analysis report

Static analysis result for SHA-256 934ea0c903627111…

MALICIOUS

PDF

72.1 KB Created: 2021-04-03 12:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8735f5f10ff78d8797cdcd0c01d6bb8a SHA-1: dc7466045dba9b0984690414c779bfb6a387b18f SHA-256: 934ea0c9036271118eb9467aa1addf1c591958b0164e33a938ee332e169d0fc4
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing campaign. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and external URI indicate a malicious intent to redirect the user.

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://botokaw.ru/award?keyword=cell+cycle+mcqs+pdf
    • http://load-bcp.com/the_5th_wave_summarydclp2.pdf
    • https://static.s123-cdn-static.com/uploads/4387427/normal_60023967a9c55.pdf
    • https://static.s123-cdn-static.com/uploads/4391921/normal_5ff2d517ed434.pdf
    • http://bezprovodov.guru/how_to_draw_books_for_13_year_oldsc53sq.pdf
    • http://dvestideyli.xyz/pauvre_anne_chapter_4mstt2.pdf
    • http://flebolog24.com/namokevajexurgjp08.pdf
    • http://best-store.club/narnia_3_in_tamilyogik57bm.pdf
    • http://kprovk.xyz/dawuvinuxewupoja9kjvp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://temomij.epizy.com/estudio_biblico_del_libro_de_hechos.pdf
    • https://s3.amazonaws.com/rupatojuko/vakinukenow.pdf
    • https://uploads.strikinglycdn.com/files/11dc51ab-97c1-4c0b-8272-e9a593c2aae6/wawulazumifa.pdf
    • https://uploads.strikinglycdn.com/files/823d1edf-5fbe-4227-8f48-9d439427adbf/swf_single_head_embroidery_machine_price.pdf
    • http://fuzakumadobujav.epizy.com/56550611687.pdf
    • https://s3.amazonaws.com/meludav/76761847986.pdf
    • https://s3.amazonaws.com/jazamerijekufol/bitcoin_trading_platform_dragons_den.pdf
    • http://tatasoge.epizy.com/adjectives_synonyms_and_antonyms_exercises.pdf
    • https://uploads.strikinglycdn.com/files/998cba3a-c09b-4edb-96e1-60fdd94915f5/nowekevapator.pdf
    • 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_off0000dd08.bin
8ee61a106a1041d79f5bbfd16512f111fc89a22d91d830b5a82587ff7dd80dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD08 5128 bytes
font_01_sfnt_off0000ee75.bin
be42ec5e16023550ca0e4d630d883bdace35c52df8881ae2215993d46e450547		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 10936 bytes

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