Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7d078b5916e334…

MALICIOUS

PDF

70.2 KB Created: 2021-03-06 07:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8b0bf025f4808b49c99272fb72265a8b SHA-1: 85085dac1127861c74d3b97d0b7b4bb7c6d41086 SHA-256: 3f7d078b5916e334785921aa29ab02bc6af1712250c0bcbb9c092c55817af4cb
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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://midufefew.ru/award?keyword=how+to+install+presonus+audiobox+usb+96 PDF link annotation
    • http://rexevivejegox.scienceontheweb.net/48266687609.pdfIn PDF document text
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/miselolajakaxa_nopujunale.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/gjhdhaD/jifiduxisimafakuroxu.pdfIn PDF document text
    • https://roguzemu.weebly.com/uploads/1/3/6/0/136018034/fidudesejo.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/carquest_wearever_gold_ceramic_brake_pads_installation.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/8503334.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/formation_microsoft_word_2010_gratuit_complet.pdfIn PDF document text
    • https://cdn.sqhk.co/texekikevow/5jbggja/konerawa.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/hdgjgfJ/83882845152.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/xgfqjjg/vigapabozozalusapuj.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/dhaahbH/jabob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/video_capture_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/sopifabatebomenej.pdfIn PDF document text
    • http://zatejufeg.rf.gd/97947679371.pdfIn PDF document text
    • http://wijotifiku.rf.gd/mathematica_ubuntu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/avery_label_format_5267.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_off0000d63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 5524 bytes
SHA-256: 20ed9a95e187a6f29e72204712855e2438c312e49e5286e8c53995ac5ad328d8
font_01_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 10104 bytes
SHA-256: ef2ce8428fb4bb69a56740dff49050ba80269f066cb796178fe1459ed074e6f4

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