Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f83c683a16d84d…

MALICIOUS

PDF

97.8 KB Created: 2022-05-08 20:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 66013aefa3b4b8ffadfebba1e6705a8a SHA-1: b658eaf2fda503898e543523421c6c158e01eb03 SHA-256: a4f83c683a16d84d7272bb6fda811d8c15edb9ea3f3979398d302be83c89c06b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • 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://yubit.co.za/YmrXLWy8?keyword=family%20reunion%20registration%20form%20pdf%20forms%20free PDF link annotation
    • https://jotuxopa.weebly.com/uploads/1/3/4/2/134265841/9145311.pdfIn PDF document text
    • https://loyq.ru/admin/upload/photos/library/files/netalo_1644373026.pdfIn PDF document text
    • https://tefawizudarezuf.weebly.com/uploads/1/3/4/6/134640126/surimewetezusiv_vesosotufejax.pdfIn PDF document text
    • http://artstone-eg.com/userfiles/files/kovezerutodi.pdfIn PDF document text
    • http://theblare.com/image/upload/file/turiwoza.pdfIn PDF document text
    • https://lotisala.weebly.com/uploads/1/3/7/4/137498851/selufurolegen_zujatubi_sajetujopa.pdfIn PDF document text
    • https://sewupesumip.weebly.com/uploads/1/4/1/2/141292127/5364307.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/kagujoleva.pdfIn PDF document text
    • https://tabikajodunel.weebly.com/uploads/1/3/0/7/130739544/2961875.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/xupekixevekave.pdfIn PDF document text
    • https://sovunuvewawum.weebly.com/uploads/1/4/1/7/141702323/d55dfe.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2022-3-20/20220320192246666853.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/63256929500.pdfIn PDF document text
    • https://lisumefi.weebly.com/uploads/1/3/1/4/131408082/viwifinukex_favep.pdfIn PDF document text
    • https://sifoginugiji.weebly.com/uploads/1/3/4/5/134588619/362de481b411.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/f9cb45849.pdfIn PDF document text
    • https://fupemotajupatis.weebly.com/uploads/1/3/4/7/134718556/9a9606cb.pdfIn PDF document text
    • https://lajarotipedin.weebly.com/uploads/1/4/1/4/141418086/209fd37a.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/dejubakowuzilemigebuki.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/9241298.pdfIn PDF document text
    • https://didunoduwogu.weebly.com/uploads/1/3/2/6/132682107/0076f819.pdfIn PDF document text
    • https://menusopam.weebly.com/uploads/1/3/4/5/134597334/4369182.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/25971194299.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off00011b73.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00011b73.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B73 16884 bytes
SHA-256: dbb8c34dab4daca9f75651ffb8cddd6529cafc07f14f8fdadcb0b2a4c702ef34
font_01_sfnt_off00014711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14711 11032 bytes
SHA-256: 3e23f2f5151669253dea23ee7732a02dcaef383376ea3e26392372e454312327
font_02_sfnt_off0001607e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1607E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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