Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a9153f88ec85da…

MALICIOUS

PDF

90.7 KB Created: 2021-03-18 03:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4b41fce142a577619fc4cd2be7db37c9 SHA-1: 0e833e93f6ae96322517b30099cbecf918196728 SHA-256: c9a9153f88ec85daa71b24a84cb5ae5193bfb1e78761ffde12d4d655e698d323
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The ML classifier strongly indicated maliciousness, and the PDF contains numerous embedded URLs pointing to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's purpose is to act as a link farm, likely for malicious redirection or SEO abuse. No scripts were extracted, but the sheer volume of suspicious URLs indicates a high likelihood of user redirection to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://mezovuduw.ru/wix?keyword=njrotc+uniform+dress+blues PDF link annotation
    • http://nomokesus.sportsontheweb.net/confess_by_colleen_hoover_series.pdfIn PDF document text
    • http://instasurprise.online/38788411629tcn3w.pdfIn PDF document text
    • http://italysummer.fun/commutative_ringkzm71.pdfIn PDF document text
    • http://zalavsky.ru/islands_of_decolonial_lovexxj1w.pdfIn PDF document text
    • http://carinsusa.com/windows_10_manual_18031xs8o.pdfIn PDF document text
    • https://cdn.sqhk.co/lesebonun/fZiiiay/saxixekepubota.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/idSJhf1/learn_spanish_through_english_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497395/normal_60086d29ab6b0.pdfIn PDF document text
    • https://cdn.sqhk.co/toruwapelot/ifsiahe/30986655089.pdfIn PDF document text
    • http://milanbeach.fun/tumaradupixiznnmb4.pdfIn PDF document text
    • http://edalovert.xyz/75936896530btqlo.pdfIn PDF document text
    • http://solapp.xyz/how_to_delete_old_facebook_accounts_without_password0w384.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/qieSYPj/rufizifinopugapado.pdfIn PDF document text
    • http://retys.space/tijineifye7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467038/normal_601da454aa3c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pusapovewazigu.onlinewebshop.net/how_much_does_a_60_hp_mercury_4_stroke_weight.pdfIn PDF document text
    • http://lukafimagog.atwebpages.com/32517396533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bbdb74b-6c93-4559-aae1-35b7952329bc/tulosajevinidevibojipala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90d6776-b819-4c8e-a020-d9f50700b371/sefatofinenuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3627914e-dc70-4749-bca4-8f166006dad2/pagibevu.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/livixexanojagebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92e2844-4f9c-4016-ae93-c8f6fd07e23b/how_to_set_a_g-shock_time.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001174e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174E 5024 bytes
SHA-256: 79375424b568d95ac5e3e2f972423afc60366fad575c8afd78ccb7cd3c058ea4
font_01_sfnt_off0001284e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284E 11480 bytes
SHA-256: 489e37be684a0d747f2b6fefe93eccaabf7631906daf9f06fe4f30ecdb57302b
font_02_sfnt_off00014fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FB3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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