Malicious PDF — malware analysis report

Static analysis result for SHA-256 badc4b05d64754ad…

MALICIOUS

PDF

79.0 KB Created: 2021-04-06 06:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8367a9a5608e6c69660a1f9536a24f8b SHA-1: 44b535ae5001a1a22845fe140e6a7e5913557d1a SHA-256: badc4b05d64754adfda79c67476581bd56aee72116192f30d556a417bcf904dd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit the user's trust through a deceptive document.

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://zajinet.ru/strik?utm_term=easy+veg+indian+dinner+recipes+for+family
    • http://mishgen.com/fowapimotovugudowesozusuhcg1p.pdf
    • https://cdn.sqhk.co/vibesadebo/hiOjid1/modern_history_simple_definition.pdf
    • https://cdn.sqhk.co/zawatilirip/Vjchbhd/jepenipu.pdf
    • http://fojowufuzuno.22web.org/block_someone_on_facebook_android.pdf
    • https://cdn.sqhk.co/melipetoluf/jipggcC/activity_lesson_plans_for_middle_school_pe.pdf
    • http://ital-tess.space/cannibal_corpse_full_album_zipersyh.pdf
    • https://cdn.sqhk.co/voxedifi/Ax3Vzhc/ice_cream_recipe_condensed_milk_chocolate.pdf
    • https://cdn.sqhk.co/lewulula/lbhhNhf/accident_full_movie.pdf
    • http://tumbaa.space/girl_s_room_escape_level_18pp28j.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://masusekokuberex.rf.gd/gabion_wall_construction.pdf
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_376d621382dd4a959343d6d4fdfe509b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5ded4a05-b598-419b-909b-ab00fb5929b0/months_of_the_year_worksheets_free.pdf
    • http://gonuwufif.epizy.com/85658711006.pdf
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_63f0128d5a1342c09f4506ec49e128e9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/13717c29-a926-4269-9e80-81cf5d2bb5fb/60687065394.pdf
    • http://dokilenosabani.rf.gd/numbers_in_english_1_to_100_exercises.pdf
    • https://uploads.strikinglycdn.com/files/01992acb-3a46-49c2-a329-c4db6596b22f/25783119564.pdf
    • https://uploads.strikinglycdn.com/files/06f0fe7f-6113-480d-9ea8-c187f6e5ccea/gevirifufijivopelavudu.pdf
    • http://jidoxib.rf.gd/remadidevafaxezeranagoso.pdf
    • http://bogetezapore.rf.gd/6060333487.pdf
    • http://menokubamedutug.epizy.com/lajepolegep.pdf
    • https://uploads.strikinglycdn.com/files/3c4a50ba-f4e3-43a3-ab13-d981897edf4b/65216868159.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_off0000f45a.bin
4e476a375731860a5ce72b211d4e548d94beeb89f3bfe15e5d0e6567e134c4c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 5596 bytes
font_01_sfnt_off00010763.bin
64025a30c26fe7a19695c07cac9ccad2c3fe3d34bf6659b74cf81ad28bd73e18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10763 11188 bytes

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