Malicious PDF — malware analysis report

Static analysis result for SHA-256 a288917f34ee28c9…

MALICIOUS

PDF

85.6 KB Created: 2021-03-29 06:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d75d88b4f50873bdd73364adf03df4be SHA-1: 98b8c18621a11bd463bcbf097b7ef8f0c5cd31e6 SHA-256: a288917f34ee28c9ce9a37d3a1b0973be45c348ff8f62dde1bda24d1cbb783ef
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one prominent URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=ffxi+synergy+training PDF link annotation
    • https://cdn.sqhk.co/wosipuvetot/aJi1ghj/air_france_flight_booking_status.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/W6ZR9Mv/arcade_family_chromecast_games_iphone.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/architecture_design_free_download.pdfIn PDF document text
    • http://pexarinolal.mypressonline.com/elder_scrolls_online_build_sorcerer.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/ansiedad_tratamiento.pdfIn PDF document text
    • http://xejitifuwoligaf.mypressonline.com/sansui_led_tv_32_inch_specifications.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/barriers_to_effective_communication_definition_and_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/hcibxig/85239402531.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/nopaletefaguvamobopa.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/sulasatevirexo/awesomenauts_4._1.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/vokivikosib.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_aa88ac109fd645e4b0043cfa2b69b5a7.pdf?index=trueIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_c2bad3f3490c4893b6d414f2b0059b88.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc83a8d-030b-49b3-979a-079943f9831e/fender_hot_rod_deluxe_type_pr_246_180w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7540807-94ac-4915-a584-3b95dc83bce0/samsung_tv_cablevision_remote_control_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe57d48-2eae-4343-a24f-be81286545be/sims_3_store_free_downloads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54ec37c-46d0-466e-81c6-7be7cb57eeb1/fovejusege.pdfIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_a43638b4fd0f432e88a6fd6913e3858e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a8e649-16e3-4a09-b6c3-0e386fbab5e5/how_to_install_a_tankless_hot_water_heater.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_b5c8da35924048cdb257500db66571ee.pdf?index=trueIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_cbcd9aac241a40709aa9bfc7a7a481b1.pdf?index=trueIn 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_off000112e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E7 5028 bytes
SHA-256: 8defacf250e9ab4dd9972e6844bb828128d043dd5c17550f346b8ecdc5353afb
font_01_sfnt_off00012424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12424 10968 bytes
SHA-256: 9de631fc9f77ed9128c8956202283284f761c0ba3bdcb03f6031ab57ae8eb6fa