Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba42d7acd65618a2…

MALICIOUS

PDF

76.9 KB Created: 2021-04-02 02:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1c433e9366b0b666cb11e576c1425d0e SHA-1: dfe80980e812f74df9c51e295077d6f50c519eaa SHA-256: ba42d7acd65618a27c10be0ea29fd0b751377aa454b41cba6d24ca3afbed1aa0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/wix?keyword=idle+web+tycoon+not+doppler PDF link annotation
    • http://lunatan.medianewsonline.com/sazilepuvigonu.pdfIn PDF document text
    • https://cdn.sqhk.co/dilujuzaga/hh0t1ij/kavorab.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabumamuv/Fhggqjh/futugifaretidivixaloru.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/jbjbzh4/fewifipapuva.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/bzkQb4x/can_you_escape_the_room_9_level_24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_60232cb2581a7.pdfIn PDF document text
    • https://cdn.sqhk.co/koluvukirate/4hehagg/59668831683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_6048465713034.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/geDibA0/trigger_finger_ice_hockey.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485005/normal_602fd7cc154bb.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/nucleophilic_substitution_reaction_sn1_and_sn2.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/eziJXgi/zombie_city_survival_apk_home.pdfIn PDF document text
    • https://cdn.sqhk.co/zosikoto/8ij47Oi/work_experience_evaluation_report_sample.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_605fd43b3e7a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/jijirajalimafijo.pdfIn PDF document text
    • http://vebuluxuj.rf.gd/aorta_abdominal_anatomia.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/fiwilokunikularatuwo.pdfIn PDF document text
    • http://pukisutubog.rf.gd/50627885964.pdfIn PDF document text
    • http://pijularof.epizy.com/cyrano_de_bergerac_tirade_du_nez.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/como_saber_si_alguien_te_miente_por_chat.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/is_there_a_harry_potter_world_in_the_uk.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/how_to_connect_swann_security_camera_to_tv.pdfIn PDF document text
    • http://nuzekifigusibu.rf.gd/capital_markets_notes.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_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 4952 bytes
SHA-256: 9abc9455a4e62c56c60231af7fcf44917d5bb081217d67e58fb4c16284299e7b
font_01_sfnt_off00010432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10432 9496 bytes
SHA-256: f4d4b7e5940c02798ddb4cfc41178c8ff951cd9affd47639a825673ad3de668b

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