Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af6b8e6fed1a84c…

MALICIOUS

PDF

85.4 KB Created: 2021-03-02 11:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0438f77a27e9472fd8665f1ab071d051 SHA-1: 3044307117f0f42eb60c561b1d55b3011737e5a6 SHA-256: 2af6b8e6fed1a84c7bc8b253d5bb2fb345d8f85b77a0086cca3bc9e94b9136fc
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://mezovuduw.ru/wb?keyword=informative%20essay%20examples%20for%20middle%20school%20pdf PDF link annotation
    • http://zhenskiizhurnal.ru/amplificador_sony_xplod_2000_wattswvncm.pdfIn PDF document text
    • http://betmoy54.com/vw_dealership_service_near_mectq4z.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/sApFjbN/light_up_my_home_customer_service.pdfIn PDF document text
    • http://cardio-natural.info/34220410638y7tvl.pdfIn PDF document text
    • http://salonly.xyz/574193569vuy2x.pdfIn PDF document text
    • http://tuwuviji.iblogger.org/action_movies_2018_full.pdfIn PDF document text
    • http://zzzmmmmejjj.space/defuvawizorewwbv7.pdfIn PDF document text
    • http://copyright-infringement.business/mini_golf_colorado_springs_academy_blvd5wyj3.pdfIn PDF document text
    • http://yozi.store/82193155241hok9m.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/resumen_capitulo_20_cien_aos_de_soledad.pdfIn PDF document text
    • http://iglivesupportteam.com/kodalejokamasudaxuwewulen01mos.pdfIn PDF document text
    • http://zabogena.iblogger.org/3759559657.pdfIn PDF document text
    • http://stat-index-co.com/chaudiere_frisquet_hydromotrix_23_kw_ventouseaboyq.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/hLhbNrF/35252414908.pdfIn PDF document text
    • http://raladotid.22web.org/probability_practice_problems_in_hindi.pdfIn PDF document text
    • http://libralab.digital/clone_phone_app_apk_downloadumses.pdfIn PDF document text
    • http://canonsburglake.org/blank_business_model_canvas6kdop.pdfIn PDF document text
    • http://teplotronic.ru/what_is_meant_by_module_in_educationflkq4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guvubaxi.epizy.com/autodesk_vault_trial.pdfIn PDF document text
    • http://fozajabuwipebo.epizy.com/62816095427.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_off00011095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11095 5560 bytes
SHA-256: b6c5c41d34ac69aec257459dea3d35e0ed0e782170b529f8c62a1b10f0f52f0d
font_01_sfnt_off00012362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12362 10964 bytes
SHA-256: a99b448f855cf842ed0ced71d302ec07edd90843f602a8dc0c76f9ff6af2b206

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