Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02a36a6d6b68242…

MALICIOUS

PDF

85.4 KB Created: 2021-04-02 20:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e928e4f9d3e63509f003b447c0360e6b SHA-1: 84c583a4f244fb0ad8c1d2c3397e4437894c5140 SHA-256: b02a36a6d6b6824227632f8b28dbc2ef65d0e52b2e9994e6ddb65bf2a95b9a5b
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 ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a book title, likely to trick users into visiting these malicious links. The presence of external URIs and the link farm heuristic indicate a strong intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=baudrillard+simulacra+and+simulations+pdf PDF link annotation
    • http://yatvoyya.fun/44381200725jnwtt.pdfIn PDF document text
    • http://nerroba.info/guitar_songs_lessons_chords_hindiakzos.pdfIn PDF document text
    • https://cdn.sqhk.co/difejekexe/idHijia/traffic_racer_hack_ios_download_free.pdfIn PDF document text
    • http://freefire-gifts.com/3rd_grade_math_multiplication_worksheetsqpcav.pdfIn PDF document text
    • http://freds.space/xuzogazoneboxuwuwapolut6kyy.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/kotiguvagezo_kukatofiwen.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/bounty_hunter_junior_metal_detector_manual.pdfIn PDF document text
    • https://nowiwadigomu.weebly.com/uploads/1/3/4/0/134018048/werefoga.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/WUWOhih/sssniperwolf_youtube_channel_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/aiienuR/36380846748.pdfIn PDF document text
    • http://yandex-delivery.cc/85786023145xpuju.pdfIn PDF document text
    • http://losinglotterynumbers.com/zineta9mww.pdfIn PDF document text
    • http://latuha.com/imagine_dragons_demonsmlm0k.pdfIn PDF document text
    • http://forecast.bet/ladazafimajefamuwbmmqz.pdfIn PDF document text
    • http://gdztut.com/pcaob_audit_report_example9euai.pdfIn PDF document text
    • http://ig-soft-team.com/bedwars_hypixel_mappi378.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/ljh4xVL/melibegaxafuf.pdfIn PDF document text
    • https://miwijefovutifim.weebly.com/uploads/1/3/5/3/135316182/3401456.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemunebo.atwebpages.com/4725479717.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/identifying_adjectives_and_adverbs_worksheet.pdfIn PDF document text
    • http://bafuwujix.atwebpages.com/banking_regulation_act_1949_latest.pdfIn PDF document text
    • http://bidusibebawuz.onlinewebshop.net/adobe_photoshop_cs6_tutorial_in_telugu.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_off00010c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C26 5348 bytes
SHA-256: 97aee15729be961957eb08571359a9b426ce43144f540c1eddb7a014298f528e
font_01_sfnt_off00011e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3F 13004 bytes
SHA-256: 58bbd38d18b4257bb69bda32cf04cb2bc22431eed1af2313ec5b8c947e99f5f8

Open this report in the interactive analyzer, or submit your own file for analysis.