Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97af87fd7511332…

MALICIOUS

PDF

77.0 KB Created: 2021-03-01 17:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 391f74181402990f2aaf1d2cfd7631e5 SHA-1: 6e07d6e618fc98cdcc08b45f7ca1a4d56eb64c53 SHA-256: f97af87fd75113324170ae11535cd92b6b26c8fdf0e42d9d504e5991e26b2a1e
134 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm and contains a download button lure. The embedded URLs and the document's structure suggest an attempt to trick users into downloading further content, potentially a second-stage payload. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which could be used to facilitate downloads or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/award?keyword=can+you+play+grand+theft+auto+5+on+xbox+one PDF link annotation
    • http://lilubaxubaxulu.sportsontheweb.net/jifibazufikoxabofa.pdfIn PDF document text
    • http://leftoutclub.com/modatujesejubedoxofio2m9j.pdfIn PDF document text
    • http://metalllift.ru/captain_america_the_winter_soldier_filmyzilla19f4v.pdfIn PDF document text
    • http://reduslimitaly-official.site/32715147876tqiky.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503787/normal_602f1dac594fe.pdfIn PDF document text
    • http://life-news.tech/acrimony_full_movie_freewflzx.pdfIn PDF document text
    • http://shop-you.xyz/36884356506g10qx.pdfIn PDF document text
    • http://sethel.xyz/fisher_and_paykel_dishdrawer_handle_repair37e9u.pdfIn PDF document text
    • http://ing-cliente.com/syntropic_farming8j6lz.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/war_room_book_author.pdfIn PDF document text
    • http://busibear.com/kodisafix7cfvx.pdfIn PDF document text
    • http://ideaita.fun/solved_questions_on_residential_statussebmk.pdfIn PDF document text
    • http://dkmz1.club/officially_missing_you_piano_sheet_music0cfjo.pdfIn PDF document text
    • http://parralax.net/is_mathematical_analysis_hardba6qs.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/zanesagalin.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
    • http://kopolug.myartsonline.com/propiedades_mecnicas_de_los_materiales.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/xizasipikonivoronanidak.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/17457981879.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 5416 bytes
SHA-256: 4b6ca60a8ea7361872c57f76e435563feac95913c298de41f9c8177a6a9cc183
font_01_sfnt_off0000f573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 10224 bytes
SHA-256: fb6f3e3edbee244a2f1ad09f6ee7063461f034edbfdf337d667b0a7ded68dcbc
font_02_sfnt_off0001186d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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