Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f21d77d17e892ab…

MALICIOUS

PDF

67.9 KB Created: 2021-02-22 11:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5c49af9d39cbf7741035f22720f4bc56 SHA-1: 3ab5c463e681df6e5ce35842ca3d13f9fa5e53d5 SHA-256: 9f21d77d17e892abb76872762ffcab81dd8110f2bfd7b24b29284e7328a241c7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://jacksth.ru/wix?keyword=blood+of+olympus+pdf+google+docs PDF link annotation
    • http://ig-verifiedsbadge.com/lufakosohko8q.pdfIn PDF document text
    • http://tumbochka.space/71328242876i5wzk.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/iKghdmb/injustice_gods_among_us_ios_glitch_2019.pdfIn PDF document text
    • https://mimuromujalu.weebly.com/uploads/1/3/0/7/130739347/dunumulav.pdfIn PDF document text
    • https://duzobiwaroliwu.weebly.com/uploads/1/3/2/6/132696147/pugejumexuxu_xafasirux_kufuduju.pdfIn PDF document text
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/d7538f079.pdfIn PDF document text
    • https://fadirepux.weebly.com/uploads/1/3/1/4/131438814/7508607.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/ivJhfgi/wimaguf.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/iYhaxgi/57707355038.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/cliiQhb/simozomijezuzedopixod.pdfIn PDF document text
    • https://pejexiguwela.weebly.com/uploads/1/3/1/1/131164442/muxogarozezirovozilo.pdfIn PDF document text
    • https://vezorobabuwej.weebly.com/uploads/1/3/0/9/130969079/4797343.pdfIn PDF document text
    • https://wubudebekezame.weebly.com/uploads/1/3/0/7/130740051/jozuribometakibaxid.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/giggfrI/17533660041.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/cWhgpJb/21234141157.pdfIn PDF document text
    • https://cdn.sqhk.co/dupetodim/voYEyhd/bingo_ball_dropper.pdfIn PDF document text
    • http://mandarins.space/business_accounting_major_description99s31.pdfIn PDF document text
    • http://hookup757.fun/540809806122wuzq.pdfIn PDF document text
    • http://supsun-aero.com/betano_app_androiddqdim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1F 5320 bytes
SHA-256: a17ef8ce65598eabaa84e4366b3641b96660c3e502aaa2338349e238ee5ae73c
font_01_sfnt_off0000df43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 10264 bytes
SHA-256: 1a89494b8cb160fd0f8aa70403425a961367ebe5a6d1e2b1a725cb5eaaf656a7