Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a05067a8c1fd4ec…

MALICIOUS

PDF

74.6 KB Created: 2021-03-20 03:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c65555ad5ab5c3b5c6b8f1c7e47e7aa5 SHA-1: e030eeabe720adbea56e70d75e024a01a1903fc3 SHA-256: 7a05067a8c1fd4eccb5c650c4a0567679c20714c7ebe605760929d4d1696454b
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=sage+one+accounting+tutorial+pdf PDF link annotation
    • https://cdn.sqhk.co/vafegijateno/gj1idji/space_decor_dream_home_design_apk.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/wivunaxewefasen.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/51GORML/pocket_frogs_level_up_fast.pdfIn PDF document text
    • https://cdn.sqhk.co/munenetifu/QTrPib7/94839405080.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/fiajiid/kusili.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/kutorejunuf-dagafexo-legijinem.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/6716631.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/thcgjjd/line_paint_tray_with_plastic_wrap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_bb134aee800241e6b1c2987827e44a46.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8646d90-e929-4e7a-a98b-62a9d72b2c12/46491167437.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/destruction_warlock_3._3_5_pvp_guide.pdfIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_b720180ebc374c378486e2a7ff4365ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/green_screen_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8f85a04-694e-48ec-ab2a-653b00dd1a6f/are_all_xbox_one_wireless_controllers_bluetooth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276a0e01-35de-458a-8d43-a120247e88c5/xirarivi.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/what_is_a_research_instrument_definition.pdfIn PDF document text
    • http://piwodapasolok.rf.gd/how_to_outline_an_argumentative_essay.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_e74237be36fe4a0485f5b52c7e651b0d.pdf?index=trueIn PDF document text
    • http://nijesawojate.epizy.com/high_tibial_osteotomy_procedure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddf1d267-13db-4ff8-b91f-4fc115b03b07/popiwarijolebupobigore.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_184de312ac9741bcb18ea9be7049d5b9.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_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 5248 bytes
SHA-256: 9b2f8d73b2a27fb7425208fdfe1c705e0dbb4377d45b21c6934eea30e6a4bf0e
font_01_sfnt_off0000f6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B8 10772 bytes
SHA-256: fe941fef783097d4b3601d3fb7598670c7f58b6fa8a500aa7bb06f339ffe8313