Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8c6684dc0abf58…

MALICIOUS

PDF

78.7 KB Created: 2021-03-03 23:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ca498006316919f6d4dcb10cd598b716 SHA-1: 110ba593b8261ebc21bfefd22e5dcc2d9f0e0e72 SHA-256: da8c6684dc0abf5872eddd4e28ace4e2381d8907065ba042638aa30ad2b19c0b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs further supports a phishing or malicious redirection scheme.

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://botokaw.ru/strik?utm_term=bissell+lift+off+bagless+vacuum+manual PDF link annotation
    • http://kesuvajeb.scienceontheweb.net/bonivigilexofakanuvis.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/11400665755.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/what_is_analysis_and_design_in_civil_engineering.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/puwiwuzaxogavatezanidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_6021f8c516040.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/lol_patch_10.24_download.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/can_i_renew_my_notary_online_in_ohio.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/37071089352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_60380389beb1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_603be1df7d734.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/final_fantasy_xv_royal_edition_xbox_one.pdfIn PDF document text
    • http://gelchlen.fun/your_beauty_mark_free_download9e0ba.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/zafuna.pdfIn PDF document text
    • http://forkidsshop.online/35204331321mpprk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_60315d87c9c0a.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/17233488362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478430/normal_5fd7c4a599a41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitines.myartsonline.com/77921163280.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_off0000f68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68B 5352 bytes
SHA-256: ef12c11080e0c2979f56eea6246af5e45be842b274b9b061f6be69eaf272d19d
font_01_sfnt_off000108c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C8 10640 bytes
SHA-256: 088efb1535f5711201bd97c933752af43e61890f33347ca3753ac44306e92e45

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