Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0cfa9fedfe0ed1…

MALICIOUS

PDF

79.2 KB Created: 2021-03-16 11:35:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05c7ffc1222cc299116c1b9e232dd06c SHA-1: 280aa4f39cd7d223dec69fffe0388c5d91cbcd0e SHA-256: 6f0cfa9fedfe0ed178796b6639fd85f902fa956a84249f2308dc75fcd8654f32
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to obscure the true malicious destination. The document body, though heavily obfuscated, contains metadata related to 'famous english story pdf free download', indicating a lure for users seeking content.

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://fokemale.ru/award?keyword=famous+english+story+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449781/normal_6032cb1f48d5a.pdfIn PDF document text
    • https://cdn.sqhk.co/lukulobu/jghgOie/wupezogakavifani.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/0jghcSR/zejujoxitoroxodu.pdfIn PDF document text
    • http://rafale.store/jazz_christmas_piano_sheet_musicbzrxh.pdfIn PDF document text
    • http://dexuposi.sportsontheweb.net/98421288937.pdfIn PDF document text
    • https://cdn.sqhk.co/dasekizob/hesRnhf/charge_2_won_t_sync_with_ipad.pdfIn PDF document text
    • http://lafilubepojev.scienceontheweb.net/budgeting_and_financial_management_in_education.pdfIn PDF document text
    • http://youralteragoods.com/how_to_activate_voice_command_on_xfinity_remotepsm2n.pdfIn PDF document text
    • http://newser.site/whirlpool_washing_machine_drain_pump_locationajhr7.pdfIn PDF document text
    • https://cdn.sqhk.co/sawusuzi/iehiBhd/redemption_code_pack_tokyo_ghoul_dark_war_2020.pdfIn PDF document text
    • http://operationhomeplate.com/440221072517q86s.pdfIn PDF document text
    • http://sexesex.site/18415294402oq9u5.pdfIn PDF document text
    • http://kleomaften.online/rinivugozotosawokudmwvl1.pdfIn PDF document text
    • http://safetymirrors.xyz/bayesian_statistics2cuxq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_602520e274f06.pdfIn PDF document text
    • https://cdn.sqhk.co/femelofep/diajalU/ted_bundy_liz_and_molly.pdfIn PDF document text
    • http://vzale.ru/download_ucraft_free_apk_whatsappfumby.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5feafad33dcee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/278c1d3c-a573-4739-a81b-e51bf90dd05c/escort_passport_9500ix_platinum.pdfIn PDF document text
    • http://dezinolabebosod.atwebpages.com/aglutinasi_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5757032f-2fef-4e75-9740-3d49db022ef8/30797918019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe044f3-3691-43d8-be73-8a9aef6dddc2/angelcare_ac401_avis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7c0e2c-0388-43bf-a148-bb4948ad4ed3/red_cross_lifeguard_certification_extension.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_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 5604 bytes
SHA-256: 1bcb0c7acf08bffaf6398c745a8baf397bd23ba55ba1328323a9a744cf1e872f
font_01_sfnt_off0001088e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 11268 bytes
SHA-256: e7cb9613eb2617f68b3ba18d02e86a3e19ddd2255e603706dcd0a3f21e1d8991

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