Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c66989f20973b3…

MALICIOUS

PDF

102.7 KB Created: 2021-03-29 18:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8e3c37a5347cae0286092f74072bb7ce SHA-1: 267c61b3b2f62d2c9b12574e85e55050a2b83278 SHA-256: 95c66989f20973b3c2dd9731453189086f42b9faa12a6262925afe06fb47feae
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, with one specifically pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable domains, further supporting a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://dugedepap.ru/123?utm_term=btd6+chimps+guide PDF link annotation
    • http://submonster.xyz/the_armor_of_god_bible_study_book_bylpmat.pdfIn PDF document text
    • http://kupiokno.su/cognitive_perspective_weaknesses8fr7d.pdfIn PDF document text
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/7165302.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/tigedabetosenel-vejeg-newajukupa.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/1769019.pdfIn PDF document text
    • https://nokibuvekunel.weebly.com/uploads/1/3/1/1/131164430/zulutigepi.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/iiUhkNT/beast_quest_game_ps4.pdfIn PDF document text
    • http://prizinsta.site/stock_market_for_dummies_review53yxj.pdfIn PDF document text
    • https://cdn.sqhk.co/rotusorukazi/AghhheU/gaxolurujimosujolibabumu.pdfIn PDF document text
    • http://ompala.store/nosuxilujerubofeabnoy.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/p0ggWra/transmission_fluid_change_cost_valvoline.pdfIn PDF document text
    • http://sacredname.ru/nubavehs0ji.pdfIn PDF document text
    • https://votorivoxezi.weebly.com/uploads/1/3/4/0/134095847/f1f1c74d.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/jjfw7Fn/35390095197.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e67a1b48-4ff8-47d2-ad85-0706f987e994/revolution_advent_calendar_2020_priceline.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/line_6_spider_headphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f1d5f6-248f-45f8-84c3-49ab063ec3e3/how_to_become_appliance_repair_technician.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22305eb-22e4-4af4-9e6a-e970ef846d84/how_to_install_android_nougat_on_nexus_7_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/69969302674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2197171e-4f51-4b9e-b8f6-f101e3d4d383/29858121018.pdfIn PDF document text
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_f6be764cca0c41e883ebb6b4c90eec1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/51199390890.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/diditafatakunok.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/36028405082.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_3e90acc7b1d845fc8917a537ffe91ac1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BC 5016 bytes
SHA-256: e1646c708ef4ba972c8c2abfc6df43f666fff8787f62ecacb73942b6eb9ef000
font_01_sfnt_off000157d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D6 11640 bytes
SHA-256: df24eb0042dcbddf135504d56f7d0d0a94186ba437b615a642ae285f04067c0a
font_02_sfnt_off00017f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F88 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3