Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c15e36cd3057be…

MALICIOUS

PDF

104.9 KB Created: 2021-03-24 13:34:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7be8f50c2af2cfe3c0ee8985fd306b23 SHA-1: 7701281a08ad7ad8d01a7f7f0b761849f8d95a30 SHA-256: 41c15e36cd3057be27692099b5d3af34bae98930063ba758d783ace94b2c5d81
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The presence of embedded URLs and the overall structure align with techniques used to distribute malware or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ponafet.ru/123?utm_term=bendy+and+the+ink+machine+game PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416927/normal_5ff6104395fd9.pdfIn PDF document text
    • http://ideaita.fun/nifevusowiruxoduli21e3h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_601a77d1a8a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411229/normal_5fdae7f9c3f37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_605032d99c6ae.pdfIn PDF document text
    • http://winclean-shop.space/sourate_ayat_al_kursi_traduction_francaiseui54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420775/normal_5fe22e96bb37f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_603611a859291.pdfIn PDF document text
    • https://nenogeva.weebly.com/uploads/1/3/4/6/134661531/jozires.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_6001423693b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_604a64d58a4b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485929/normal_5ff2fe87ab3f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448746/normal_6002b6f01147e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365998/normal_5ff113003d5f2.pdfIn PDF document text
    • https://tiwedipetubed.weebly.com/uploads/1/3/2/8/132816066/xaxokajegimo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_603c330f9b274.pdfIn PDF document text
    • https://ganunuzarije.weebly.com/uploads/1/3/4/5/134518475/8535206.pdfIn PDF document text
    • https://tuxemadoja.weebly.com/uploads/1/3/2/7/132712185/5605927.pdfIn PDF document text
    • http://batut.space/59470291063fichh.pdfIn PDF document text
    • https://kesafukiwunutab.weebly.com/uploads/1/3/4/9/134900694/fajenoxasilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412159/normal_6027d5d9555b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_51ffd2997a1946e99bdfe4ffb1761513.pdf?index=trueIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_8f5fb453d0a243a28504f4435cfc372c.pdf?index=trueIn PDF document text
    • https://8ed7ad90-0d0e-491f-9c15-1f6cd5a61d18.filesusr.com/ugd/f1a804_a49f06209635407c9105835058831368.pdf?index=trueIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_af25f4237bca4f658ebefda2eaabb841.pdf?index=trueIn PDF document text
    • https://63995da9-74be-4895-8497-a4fa53c9845d.filesusr.com/ugd/788c84_6317d0492b2049f9b1fbcf90740fb7ef.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_off00015a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A16 5264 bytes
SHA-256: 2d11460e9dc316b51b3550ff98cd94259b38744716ae818f95901826934462d3
font_01_sfnt_off00016be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BE9 12540 bytes
SHA-256: b78eed8db6508c03a36e28bee821993b85d952ae8e5b93f4193b7028bdd0254f