Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6bcb72fb355e31…

MALICIOUS

PDF

69.4 KB Created: 2021-02-15 21:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: f60632c6a8e8c761e6279e62534af0c0 SHA-1: f23e81eaa1e0ddca562f72706128ff42b7380ed7 SHA-256: 2e6bcb72fb355e31b89aae7c7256d287c9663bfa7bda78ee626708a8f2223874
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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/wb?keyword=fundamentos%20tecnicos%20del%20voleibol%20voleo%20alto%20y%20bajo In PDF document text
    • https://nivuzodix.weebly.com/uploads/1/3/1/4/131410872/dozigo_kofewadul_bapovudiwufino_kezuloxakopobix.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/hQhheib/dragonvale_rare_egg_of_mystery_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464327/normal_6026724a64e8e.pdfIn PDF document text
    • https://motonolezigit.weebly.com/uploads/1/3/2/8/132814123/d80e32d769b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491173/normal_600f7a2993d50.pdfIn PDF document text
    • https://ramorebuba.weebly.com/uploads/1/3/4/8/134898890/7356675.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375702/normal_5fe2e90fe5f1d.pdfIn PDF document text
    • https://jaxuvoxet.weebly.com/uploads/1/3/5/9/135979876/kisafakor-megamuvazosapej-negofenozimim-taruw.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/Lz7jjjf/jabofavoxadates.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370744/normal_5ff7a12e43907.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/317fe8.pdfIn PDF document text
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/fuwenug.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/hhJHdig/33198557268.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/farezelof/either_vs_neither_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/dukil.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_off0000d1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B7 5324 bytes
SHA-256: b660498253539e78656e84a4cf3b3d462e692df28e1cc63a00266f39f76e3719
font_01_sfnt_off0000e3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D7 10692 bytes
SHA-256: 60f34ff9825120c3ffe22e12c1ba09a59dcdd28759a9d14174809c8dd0b6d390

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