Malicious PDF — malware analysis report

Static analysis result for SHA-256 1303a78e43e6c18a…

MALICIOUS

PDF

74.7 KB Created: 2021-04-05 06:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7bb51eaaca37bb93d6886d115effd6a8 SHA-1: 2a319e57feda0178173dac7af3d8e70de134c5f9 SHA-256: 1303a78e43e6c18a6726f830c18520bf04ad2db5d2f44443a880edc4df96570f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing users to 'dugedepap.ru'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=lds+nursery+manual+lesson+2 PDF link annotation
    • http://bokazisenu.22web.org/federalist_10_study_guide_answers.pdfIn PDF document text
    • http://gebojujefe.22web.org/bexisarix.pdfIn PDF document text
    • http://kutebirodomo.22web.org/xiaomi_air_purifier_3_manual.pdfIn PDF document text
    • http://pegajopakazo.22web.org/pc_emulator_for_android_games_free.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/pevuwarobuvowa/automaticamente_favela_donz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad35abe-9af5-4310-9ecd-6e415e2b050e/jezotalugug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1f44e1-158a-4297-9cdf-df607d897bb5/4778860205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782f1074-98ae-4289-8c84-3d7ce3b73415/asus_rt-n66u_router_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/x_force_autocad_2013_keygen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0210bca3-804b-490a-8ad0-4ec6b13474b2/has_attack_on_titan_manga_ended.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c822b4bd-b949-4718-8709-6de09f27e8f0/uppababy_vista_2019_jordan.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/vugegunoxuwutud.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/el_pollo_loco_large_tortilla_soup_calories.pdfIn PDF document text
    • http://tajiranolis.rf.gd/jerodaguludamoxexusimilur.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/lizusuzugefu.pdfIn PDF document text
    • http://birifamabaxum.rf.gd/capital_letters_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efffc27a-2029-446b-8f73-c85a68076517/drow_names_eberron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f56836-b729-4fa5-80c1-f4ca70342658/how_to_make_6_figures_in_2_years.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870000b9-4973-4f08-a687-a8df360ef731/76006317267.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/busex.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/esv_bible_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/52960087874.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_off0000e8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DB 5148 bytes
SHA-256: 686006168eca5a58ac0034aad505d79678f59b2dad6c58da7aabf31e333fe57f
font_01_sfnt_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 10372 bytes
SHA-256: dcfeb54796c15899f10b3fef2963a60e394536131d2af00c64d3470f608c6561

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