Malicious PDF — malware analysis report

Static analysis result for SHA-256 82be2a984b30a160…

MALICIOUS

PDF

81.4 KB Created: 2021-06-14 02:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8702336e24900eea43e42fff9af34fed SHA-1: 4861767224a9c39614f3b6d832c814e5b3b7e3e6 SHA-256: 82be2a984b30a160297ff5737ce04d2f25677d007e0754477bd36fb8cd874e21
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a link farm, embedding a large number of external URLs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://drafthe.ru/pbw?utm_term=pokemon+volt+white+2+rom PDF link annotation
    • https://larunigilusevim.weebly.com/uploads/1/3/5/3/135320243/piforuk_ziwete_juxuwibi.pdfIn PDF document text
    • https://laborefenebi.weebly.com/uploads/1/3/7/4/137499327/xilezuxadoj.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/539598.pdfIn PDF document text
    • https://xumodaniteged.weebly.com/uploads/1/3/4/4/134480563/fereguwetas-mizelizusimav-wesotevusog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegoxelaw.pbworks.com/w/file/fetch/144597606/file_manager_app_android_studio.pdfIn PDF document text
    • http://zezupagijene.pbworks.com/f/nifuladerojetusunovob.pdfIn PDF document text
    • http://gaxoxim.pbworks.com/w/file/fetch/144996615/90133715161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7702c0-acc0-4e6a-a236-0994d5963c84/8940045730.pdfIn PDF document text
    • http://tazusun.pbworks.com/w/file/fetch/145150743/how_to_get_a_molotov_in_gta_5.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/w/file/fetch/144614565/34293602192.pdfIn PDF document text
    • http://rimikupababo.pbworks.com/w/file/fetch/145188336/picard_next_generation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc5ac85-3b4e-4a9d-a17a-400152e8768c/libros_finanzas_personales_recomendados.pdfIn PDF document text
    • http://zuvuwiro.pbworks.com/f/wegudowurazenepin.pdfIn PDF document text
    • http://kigemulu.pbworks.com/f/who_has_the_most_clean_sheets_in_premier_league_history.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/87123970514.pdfIn PDF document text
    • http://junerew.pbworks.com/w/file/fetch/144526557/banosaponef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc9d7f3-3045-465e-8e26-33bf5041c991/finding_least_common_multiple_worksheet_answers.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/ransom_of_red_chief_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94aa2531-7364-4845-b8de-f69d05556e7f/66459220627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a782c751-5751-498a-99af-683a44da3985/wafexurigiridijuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85388503-7fa2-46e2-84c1-a2d0e47228fc/19557988502.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/sepujoxedazaferurituwogov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa9e833-7ab2-4d62-9111-ddb1aa6d0e44/cualidades_de_un_lider_cristiano_evangelico.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_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 4888 bytes
SHA-256: c17398c51da164acb6bbeece6d4d319eb5fa4917c38afbe99c9a2fd17c31ed30
font_01_sfnt_off00010e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 13040 bytes
SHA-256: c4564410ee58f0f459b81b4aa5efec2df695e9c900be84caf6a3c6d935d393b6