Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b446371af40532…

MALICIOUS

PDF

83.5 KB Created: 2021-03-30 00:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c22dd617b8490df4c875375a90ea43ec SHA-1: 26af7e315052b41ca3319925a809a0a5f550208c SHA-256: 67b446371af405324dc2e2a17d9103e02c1a425fa7071baff48741ab314464cb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/wix?keyword=cuisinart+grind+and+brew+manual+10+cup PDF link annotation
    • http://muzhskoizhurnal.ru/vifarogupogavaxativeclrtq.pdfIn PDF document text
    • http://rineset.xyz/jadazexokovef9nwt.pdfIn PDF document text
    • https://zefokivovemajo.weebly.com/uploads/1/3/0/8/130874141/pasalilasezizenereg.pdfIn PDF document text
    • http://yogist.fun/how_to_write_5_100_as_a_decimal9vnrl.pdfIn PDF document text
    • http://saveyoutubebot.com/lista_de_verbos_irregulares_en_pasado_simple_en_ingles6bkfc.pdfIn PDF document text
    • http://rezonansmusic.com/surah_mulk_urdu_translation_mp3_download4iula.pdfIn PDF document text
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/soloniwukuva.pdfIn PDF document text
    • https://folodekoj.weebly.com/uploads/1/3/2/8/132814523/5464055.pdfIn PDF document text
    • http://sokolov.fun/gorilla_diet_in_zoo_saves_boyd836v.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/pace_5031nv-030_firmware_upgrade.pdfIn PDF document text
    • http://zdorovienashevse.xyz/ophelia_piano_accompaniment_sheet_music3nx3c.pdfIn PDF document text
    • http://shoop-fp.ru/mimusojelisalubireg169z.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/21045761323.pdfIn PDF document text
    • https://fuvapele.weebly.com/uploads/1/3/0/7/130738919/xuwomabivo.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/is_the_kindle_fire_hd_7_worth_it.pdfIn PDF document text
    • http://proita.space/how_to_pvp_bdo5w8xs.pdfIn PDF document text
    • http://shoop-fg.ru/vabibojll4sp.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/4d7d9547-ed7a-413e-8c68-afd8bf8f86bc/club_car_onward_4_passenger_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f7bcc2-ed7d-480a-b9bc-3b388607362e/farmer_boy_laura_ingalls_wilder_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733a53ce-49e9-43b6-801c-66c733f08932/82928948096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3089f88-f97b-4f35-a645-868d77444ae1/81261165741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cbf53f-5192-4da8-aaf7-f1dc5c9ca229/study_big_data_analytics_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f3b207-19f6-47e1-bb72-7eb51c5d1888/libro_mi_planta_de_naranja_lima_personajes_principales.pdfIn PDF document text
    • http://zotubune.myartsonline.com/79523385974.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_off000106e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 5724 bytes
SHA-256: bbb6e8fb1db5e6bde9647fce7b2e15b0d2908d02b9b42394fadda37124de0871
font_01_sfnt_off00011a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A59 11260 bytes
SHA-256: 66d877f1a2e652559bf944acade2cbbdf62f8a22793eac24e55fe692b36d0752

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