Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f630e364c3eec2…

MALICIOUS

PDF

80.9 KB Created: 2022-04-12 16:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: c18112afdc67b7ce46366dc1f923c648 SHA-1: 1888cc4a49dd9a6a0b519fecabf096672ece04b8 SHA-256: a4f630e364c3eec2ddb1672eeaa976019029337eb918367096450f0cf061f61b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://norin.co.za/YmrXLWy8?keyword=who%20is%20the%20strongest%20character%20in%20one%20punch%20man%20game PDF link annotation
    • http://valk.dn.ua/js/kcfinder/upload/files/sekomeziwu.pdfIn PDF document text
    • https://wudegilunukoga.weebly.com/uploads/1/3/1/3/131379548/kizipubavafivozenefu.pdfIn PDF document text
    • https://www.hothousejazz.com/upload/files/48855096634.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/162427398e4738---10321506104.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/60901917967.pdfIn PDF document text
    • https://tujezaxe.weebly.com/uploads/1/3/4/6/134616668/7208007.pdfIn PDF document text
    • https://vusuzawemuli.weebly.com/uploads/1/3/0/7/130775102/ramolotoj_vixovib_nafazi_tibowubakapatuj.pdfIn PDF document text
    • https://turugoduzo.weebly.com/uploads/1/3/0/7/130739986/posujuke.pdfIn PDF document text
    • https://julapaxukej.weebly.com/uploads/1/3/4/4/134492969/wefozodiwukav_xawomasetedina_xogare.pdfIn PDF document text
    • https://huscreenprinting.com/nbloom/fckuploads/file/39936274326.pdfIn PDF document text
    • https://zomijozefabeten.weebly.com/uploads/1/3/4/6/134636393/851e3350ad2aaa.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/fasigoxoton.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/73794961863.pdfIn PDF document text
    • https://xexigajusotojuz.weebly.com/uploads/1/3/1/6/131606060/3fd212f75e39.pdfIn PDF document text
    • https://fetevemukimagon.weebly.com/uploads/1/3/4/8/134896640/e89e0fec.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_off0000d697.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000d697.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD697 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 16908 bytes
SHA-256: 816da0a2364f8f36d7dd3a33a9eab25bb11c2bba48dc0f5fd4b7f676f08fc1eb
font_02_sfnt_off00011a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9E 10868 bytes
SHA-256: c7c15ce82d8cab092f896bf4154c0c2e53945ba3d95d23e01cbe4414479ead2d