Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb17f536b5dc151…

MALICIOUS

PDF

61.9 KB Created: 2021-02-21 05:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 064749c7202db6da843dbea452470d5b SHA-1: 6a83c544562629ac2856787ee69a3a7c9cdfd6d6 SHA-256: ceb17f536b5dc1515f08016bbd9568c1fb53011ac1ee9bc4d01b9960eca89a64
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://yafferge.ru/wix?keyword=eastlink+grande+prairie+channel+guide In PDF document text
    • https://cdn.sqhk.co/gilubibawi/ggcigig/best_free_space_weather_apps_for_android.pdfIn PDF document text
    • https://nolaxefipox.weebly.com/uploads/1/3/4/7/134740184/zixavez_rezamijof_nixetafuxewebol.pdfIn PDF document text
    • https://lodofimedama.weebly.com/uploads/1/3/4/3/134327961/rijereka_jituzolelifivor_lawewujigim.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/judivadulan_vutuzas_fasodugule.pdfIn PDF document text
    • http://befomibaxizep.iblogger.org/dovotewokasenetil.pdfIn PDF document text
    • http://1xbet-football.fun/biology_book_in_bengali_free6uama.pdfIn PDF document text
    • http://reggis.info/debenhams_pet_insurance_claim_formhbosf.pdfIn PDF document text
    • http://geekcods.com/63694687515otyuc.pdfIn PDF document text
    • http://help-violation.com/effective_vs_ineffective_communication_worksheetrhnux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bobepenuf.rf.gd/a-_cdm_implementation_manual.pdfIn PDF document text
    • http://mibavipef.epizy.com/foodsaver_doesnt_turn_on.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/lodgement_ref_answer_5_westpac.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_off0000b54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB54D 5356 bytes
SHA-256: 9a950088bc10d2a50b3da48015a24ab11b44b8f3c8a28b67437d79ce3e7ed8d1
font_01_sfnt_off0000c781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC781 10380 bytes
SHA-256: a9d196ef4c4f0c625831a0989cd5267a6ecb421d256c70630d47772687d374d7