Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff1e92880159ad4…

MALICIOUS

PDF

84.9 KB Created: 2021-05-09 15:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c5cceb3e34132d87b34464dd4bdc15fa SHA-1: 8aafa4ef628e1009b0dbc5c22ee7af0cd67b1c0a SHA-256: 7ff1e92880159ad49ad41364e9f43cacb517eb4f281d4b40d9d32c19435c7740
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear textual lure.

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://soxebez.ru/strik?utm_term=guerras+carlistas+en+el+pais+vasco PDF link annotation
    • https://cdn.sqhk.co/fuvopone/geJnPV9/ica_gruppen_ab_annual_report_2018.pdfIn PDF document text
    • https://vomimefime.weebly.com/uploads/1/3/5/3/135316042/kujarume.pdfIn PDF document text
    • http://sodalabs.club/are_bluetick_coonhounds_good_pets1sog8.pdfIn PDF document text
    • http://stopnutristrike.ru/how_to_reset_canon_inkjet_cartridgest3v4p.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/fidNSjf/classic_hits_100._9_the_mix.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/gd9MSji/wizz_air_stock_quote.pdfIn PDF document text
    • http://freehookup.xyz/47081251823q54bv.pdfIn PDF document text
    • http://jakartapro.xyz/job_mania_eternal_dungeon_apkoub4e.pdfIn PDF document text
    • http://gratoraama.website/zofulenawewudalelofozo4ufbs.pdfIn PDF document text
    • https://lumuvimusu.weebly.com/uploads/1/3/4/7/134719948/2611507.pdfIn PDF document text
    • http://afracheat7.xyz/suwutadijajagoculm0.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/drgeScn/vimaxafaboba.pdfIn PDF document text
    • http://like-store.site/48047354379730q6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sovotovagito.epizy.com/dimimozegodewif.pdfIn PDF document text
    • http://zufakugofozufi.epizy.com/a_thousand_years_piano_sheet_music_simple.pdfIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_9c237658da274b03baaf9bded89669e8.pdf?index=trueIn PDF document text
    • https://b18ac5c8-c825-4c59-a0a1-290c879ce4f6.filesusr.com/ugd/1a0fde_6f0cd5f188b949dfb67b5eeebb310b46.pdf?index=trueIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_76c132fb4a5141b3bd77d7a8a53c1da8.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8A 5016 bytes
SHA-256: ee3a60ae3dc1a5e7e6fc16637457ac6e9a26ee1b30ddfaceb154d0ada26e0933
font_01_sfnt_off00011fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB2 11484 bytes
SHA-256: 2aafaa407af7f77fc9245fcaa24b62dd55e05ab50bd97b00b15d9a1d60799b73

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