Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab5590037002d63…

MALICIOUS

PDF

70.5 KB Created: 2021-02-13 18:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dec15ae2fb008db8e22828b139799d55 SHA-1: 2a76946dc15cb85bead3e91dc1ea13f8d813897c SHA-256: 4ab5590037002d63bf820b75dc4564942ae73d8248fc8bd79f1f241ebd2a8465
186 Risk Score

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 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://maypoin.ru/wix?keyword=honors+chemistry+study+guide+pdf PDF link annotation
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/lipaderuwara_gugokawuzakerin_pufuwuz.pdfIn PDF document text
    • https://tugufotekaluxaz.weebly.com/uploads/1/3/4/8/134883762/pifefapuvoxi-zavewobon-xatokofeturitiv-ridazebilup.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/jiUjbgd/mini_ice_hockey.pdfIn PDF document text
    • https://dorakipep.weebly.com/uploads/1/3/4/7/134747047/sozorobobem_kiditisawabem.pdfIn PDF document text
    • https://cdn.sqhk.co/fedijadika/ughjG4S/15678149479.pdfIn PDF document text
    • https://borerejo.weebly.com/uploads/1/3/4/0/134040615/kuduladigijipi-pagogeg-fenorixuku-ruvobufomosados.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/ligafirotugipove.pdfIn PDF document text
    • https://kobawepa.weebly.com/uploads/1/3/1/0/131070010/lamokafuduxenaga.pdfIn PDF document text
    • https://porujeworor.weebly.com/uploads/1/3/2/8/132814718/katevoluzowada.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/bX5bWkC/suxozoximonidod.pdfIn PDF document text
    • https://nanawoxemataxu.weebly.com/uploads/1/3/5/3/135332584/6706635.pdfIn PDF document text
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/bajasuxip.pdfIn PDF document text
    • https://bumopabir.weebly.com/uploads/1/3/4/6/134679094/zekadebepegetuv_zegojar_todilig.pdfIn PDF document text
    • https://koxowugazetumul.weebly.com/uploads/1/3/6/0/136015765/pudebigev.pdfIn PDF document text
    • https://zevofukuje.weebly.com/uploads/1/3/4/5/134585027/xafapinike.pdfIn PDF document text
    • https://wulakajif.weebly.com/uploads/1/3/2/7/132740593/8263452.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://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_off0000ce85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE85 5272 bytes
SHA-256: 18f0593d4f6ad436abff01fe91c8e655af520ca5fdd23a7e96420230de13bc26
font_01_sfnt_off0000e045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE045 9100 bytes
SHA-256: ad494fa9234d574a815f4c1e1c0d8f6ab78fdc2ea2749a082e11edfcfca1fc21
font_02_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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