Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f10a81a08419fc…

MALICIOUS

PDF

91.5 KB Created: 2021-04-14 13:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e54ce8b84d5042f989f4ded9fe3ca4c2 SHA-1: 7b03fafb622c9653badf729246a22140eff671f1 SHA-256: 65f10a81a08419fc812c0f5d9b00aa1b383a79288085d63b18de9ffc047b4315
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=operations+manager+performance+goals+examples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470836/normal_605f8284143c4.pdfIn PDF document text
    • http://redita.fun/does_tracfone_have_a_mobile_hotspot65vfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476939/normal_6035352514681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370088/normal_5ff6b0d392bbc.pdfIn PDF document text
    • http://bitjoms.xyz/xoxapupipiwekud0zn8w.pdfIn PDF document text
    • http://izzzaaa.space/step_3_worksheets04dq6.pdfIn PDF document text
    • http://instapodarok.site/19675427809kdz2y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427085/normal_6052670790a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_604db9b429ac1.pdfIn PDF document text
    • http://italywom.space/vuwiglo6gs.pdfIn PDF document text
    • http://differencecheats.net/67368229129p0800.pdfIn PDF document text
    • http://fitnesspack.net/newofanazatowasfwpl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_2bcf46cb8a0b4513a049ecded1c63526.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_c147c2486f0a43748fd7cb4c07de73cc.pdf?index=trueIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_246a7ca1ce1e4c818dc2c02c212c4a1d.pdf?index=trueIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_ef026805eeb246f68df71a538813ad41.pdf?index=trueIn PDF document text
    • https://c2245d91-bd3f-4016-bed3-1da34bcfd793.filesusr.com/ugd/9a652e_895fddc1e2724827a4d397a66c2397c2.pdf?index=trueIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_848e4c4e1c6f4aa092485dd9a8771987.pdf?index=trueIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_f7b9b8e17ea442acb311650f7ce591f4.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12736 5432 bytes
SHA-256: d3195bc5aa036d87396def9a414d7ac0b98024f3feeb5630d0e7f2b930371ad8
font_01_sfnt_off000139a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A0 11436 bytes
SHA-256: ee91f5934a6f1c2c207f73cc032c51c11b2e4e4ae33a3d4b4c4caea6e0be2900