Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d76de8be7ebfa7…

MALICIOUS

PDF

92.0 KB Created: 2021-03-16 14:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: aeab3c33f05c96dc3795cd0bcb2ad3e2 SHA-1: d742e408cbab45902fb8690e030b4a2de8777aa5 SHA-256: 97d76de8be7ebfa75fdee626fe0eef3e47a972d56ffc9bb15776ded68c991a94
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a specific search query, likely intended to direct users to phishing or malware download sites. The presence of external URIs and link farm heuristics indicates a pattern of distributing malicious content through deceptive search result pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/award?keyword=amaras+al+se%25C3%25B1or+tu+dios+amedeo+cencini+pdf+gratis PDF link annotation
    • http://dupuladusudired.mypressonline.com/simplification_and_approximation_for_ibps_po_2020.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/32318890483.pdfIn PDF document text
    • https://ruvawuwejijexut.weebly.com/uploads/1/3/0/8/130814193/fdc5125b878a.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/wufebasalenokituwakone.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/94505458395.pdfIn PDF document text
    • http://beamorem.com/nudidojoximekizevokifafox0nnif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455185/normal_60027fb5ba1d9.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/libro_completo_colorin_colorado_este_cuento_aun_no_ha_acabado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_601789cfb168a.pdfIn PDF document text
    • https://binemipo.weebly.com/uploads/1/3/0/8/130874238/2b05fcffb2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_604422b6596af.pdfIn PDF document text
    • http://copyrightsupporteds.com/what_is_the_purpose_of_american_literatureemqrl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_727fd7dd32af40e387bd7c1d2342361a.pdf?index=trueIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_88dd47a232dd4b6a9cd90adef993757f.pdf?index=trueIn PDF document text
    • http://nevafofuvabovid.atwebpages.com/63139191001.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/what_questions_do_you_get_asked_in_a_care_home_interview.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_off00012289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12289 5676 bytes
SHA-256: 3ff17eec22e145f480d1944179eb930765868d4b16f71727588dfdc190ef163c
font_01_sfnt_off00013577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13577 13592 bytes
SHA-256: c383d0bb590e1f7eeb84d1fb5138352994a012b6d36b2fdb2607b742fc88f6d0

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