Malicious PDF — malware analysis report

Static analysis result for SHA-256 af20e5b9ea745c65…

MALICIOUS

PDF

75.4 KB Created: 2022-04-05 19:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: 4427c9b693f01e2cc2efadf5a14186bc SHA-1: 6a19c7cd35fc4d0b2658aeb9f401832f6dd39ae5 SHA-256: af20e5b9ea745c65dc61792d219e4f6b5627e2afba3bb88928dc997ad70cc4b3
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://yubit.co.za/YmrXLWy8?keyword=old%20school%20runescape%20buy%20membership%20with%20gold PDF link annotation
    • https://nuwusiran.weebly.com/uploads/1/3/5/3/135321198/124943ef447dc.pdfIn PDF document text
    • http://www.plavanikojencupraha.cz/upload/files/luvudakujibudagarakelajep.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/162173dca7074f---guzubejewefutuzi.pdfIn PDF document text
    • http://bioengenharia.com.br/public/libs/kcfinder/upload/files/24108980862.pdfIn PDF document text
    • https://polujififodujan.weebly.com/uploads/1/3/4/5/134512681/lukagofufakezomada.pdfIn PDF document text
    • https://xotinibawilufo.weebly.com/uploads/1/3/1/4/131437660/67b4ecb91e.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/75833809294.pdfIn PDF document text
    • https://zelareto.weebly.com/uploads/1/3/4/0/134096818/jofurimexexexekino.pdfIn PDF document text
    • https://pcpr-zakopane.pl/uploads/userfiles/files/76124334138.pdfIn PDF document text
    • https://nesexije.weebly.com/uploads/1/3/1/6/131607346/ccbac425e76a8.pdfIn PDF document text
    • https://vezupololepabuk.weebly.com/uploads/1/3/4/6/134600483/raluvuvavo.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/cc2675d3a4770c.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/5c5747ae3.pdfIn PDF document text
    • https://fukaxoxatu.weebly.com/uploads/1/3/1/4/131438517/fibimem_gogajop.pdfIn PDF document text
    • http://bagsh.itpd.mn/kcfinder/upload/files/8333280197.pdfIn PDF document text
    • https://gaxiworet.weebly.com/uploads/1/3/1/4/131408942/592ec1b.pdfIn PDF document text
    • https://lojawosexofiv.weebly.com/uploads/1/3/4/6/134636472/9377436.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FD 11428 bytes
SHA-256: 538cab7eb34c6ecad2d2b254d5cc8d6b8e4318746ef7eb62576e4ea690fb144b
font_01_sfnt_off0000d266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD266 1728 bytes
SHA-256: b05b88be41456241067ca475646ee3d9dae1e4989375b9a4ddaba0761505a8a4
font_02_sfnt_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 17396 bytes
SHA-256: 37e9392a56d3f066b66fef2c73f0553411721867c3c5dd23a42cbaa9f94c5769
font_03_sfnt_off0001082e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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