Malicious PDF — malware analysis report

Static analysis result for SHA-256 4379445d96a98f04…

MALICIOUS

PDF

85.4 KB Created: 2021-04-07 23:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 940fde96b6801b0093aa32c8fb9984c5 SHA-1: 23d991c74e9c38b39fca0e99b8139450995ff09c SHA-256: 4379445d96a98f0455de07c7501f4083397f51026339dcf782cb11bc543b5c2a
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO-optimized pages designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/strik?utm_term=how+to+use+a+backstrap+loom PDF link annotation
    • https://xododasewa.weebly.com/uploads/1/3/4/6/134600374/63153cc489.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/94008699266.pdfIn PDF document text
    • http://instahelpforbusiness.com/904971420586hhta.pdfIn PDF document text
    • http://fasad-dom.site/master_cleanse_book_by_stanley_burroughspi9md.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/excel_vba_do_loop_array.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/65763335410.pdfIn PDF document text
    • http://ita-fitness.fun/what_is_relapse_prevention_trainingx293w.pdfIn PDF document text
    • https://julasunanuk.weebly.com/uploads/1/3/4/3/134308365/88012.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/tokiv.pdfIn PDF document text
    • http://doordash.link/1752868126426uc.pdfIn PDF document text
    • http://apparently-home.com/83270054545njkpo.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/what_are_the_four_core_elements_of_hip_hop.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/how_to_create_a_stock_watch_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/54966199196.pdfIn PDF document text
    • https://dopitusorotid.weebly.com/uploads/1/3/0/7/130738794/menebuz_kawerilon_kexelanesowejav_gorefaluf.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
    • https://uploads.strikinglycdn.com/files/784fee4e-494d-44da-9e51-9a74f07a16f4/what_time_is_the_bethlehem_star_visible_tonight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d67ccf-1d48-478f-90f6-0b466e2ecc38/what_does_media_studies_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55186559-cf1c-4d9d-809c-bb014ae01ded/when_does_the_new_wu_tang_season_come_out.pdfIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_2d4688340aca4384bc3a6821139a872c.pdf?index=trueIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_d7cda5543fba4af893e8709932797121.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87514413-622a-4c06-beb4-b47478cc5709/95750966848.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_off00010135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10135 5064 bytes
SHA-256: da475618cd27f551c2eaef8e3ceb2b8d73672a56ef552e41c5416b6fadefb003
font_01_sfnt_off0001127c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127C 11188 bytes
SHA-256: 8fa25026bb73b013ec895dedd9afb582aaf898d8b1ac0411cda94c09fad37768
font_02_sfnt_off0001386f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361