Malicious PDF — malware analysis report

Static analysis result for SHA-256 975acc1af9bdc513…

MALICIOUS

PDF

78.6 KB Created: 2021-03-20 02:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 27a46c81bb4a5b5f6422b1adc88574f3 SHA-1: d38a73897a32df988a041682897c3c047b01b87e SHA-256: 975acc1af9bdc513a9e9c39d0bc3bc7d1fcaf0c4376de1422823fd22a5ea7eb6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/strik?utm_term=neil+gaiman+books+of+magic+pdf PDF link annotation
    • http://centerbluebadge.com/36716799339ft5wi.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/qmhaijT/hot_wheels_race_off_hacked_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/zhbhdjf/nomenclature_of_coordination_complexes.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/solid_waste_management_nptel.pdfIn PDF document text
    • http://hihikane.space/nintendo_wii_u_virtual_console_games_listuv2f7.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/RXgfcss/xotemebuzaselajazuko.pdfIn PDF document text
    • http://trickyturkey.com/zibanusevevabbn15.pdfIn PDF document text
    • http://yildirimotobursa.com/carol_dweck_mindset_downloadqda59.pdfIn PDF document text
    • http://fridgeservice.ru/778926560965lb89.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/tunobafof.pdfIn PDF document text
    • http://lanizimugigil.getenjoyment.net/wesasusatarakofapivudisib.pdfIn PDF document text
    • https://cdn.sqhk.co/jepogedofuz/eXDFkgf/map_of_countries_that_colonized_africa.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/rilusobavelisuvuw.pdfIn PDF document text
    • https://cdn.sqhk.co/rowagana/hGjegdc/canon_eos_2000d_specifications.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/28669099794.pdfIn PDF document text
    • http://tameeniraq.com/fluid_mechanics_physics_wallah_notes6n1ym.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/ihmhfGN/2xl_mx_offroad_apk_pure.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/ebChggi/baker_business_3_premium_apk.pdfIn PDF document text
    • http://verification-help.com/sekonic_l-308x_flashmate_reviewq6i5w.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/08074591-2303-480c-a476-31cf97fbe298/61997667719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15fc115b-40c4-4894-8d11-43dd90d6c0f4/icewind_dale_map_rime_of_the_frostmaiden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561388e3-1cc1-469a-887e-a1dbd94d305d/tifazuvulufogawagujimiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c84c97-a1ae-4be2-a33d-88942beeba72/edtpa_examples_task_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/698795b9-fcee-48a1-804a-bb022b775e6a/dell_inspiron_620_motherboard_drivers.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_off0000f31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 5552 bytes
SHA-256: e28f60e29d5e582686e7ab5f24b691d9872570da2eaf84dfde6c2e457d285e92
font_01_sfnt_off000105fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FB 10944 bytes
SHA-256: 77b59069f5386fabf9e780d228b1079b18f58d685f7622872fcf4a97e2a6e0f6

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