Malicious PDF — malware analysis report

Static analysis result for SHA-256 87539a1a691cdd8b…

MALICIOUS

PDF

73.4 KB Created: 2022-04-17 08:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-04
MD5: 42a3b83f1a3fedf8539a5236d4baa724 SHA-1: 059ed87e2fe9be0592a0c2724ee779adcb3d2d07 SHA-256: 87539a1a691cdd8beb3f8416fe7378c99e7fed95cd8954da7b4f1b67d08a5d62
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://lncxjzxxw.com/upload_fck/file/2022-2-1/20220201163122964086.pdf In PDF document text
    • https://petribax.com/userfiles/file/77369972919.pdfIn PDF document text
    • https://demideopool.ro/ckfinder/userfiles/files/fodominetoduniretawed.pdfIn PDF document text
    • https://xozilawowoxov.weebly.com/uploads/1/3/4/7/134704750/pawilaw.pdfIn PDF document text
    • https://dejokorakas.weebly.com/uploads/1/3/1/3/131379117/kibivelofo.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/ruzekajoke.pdfIn PDF document text
    • https://kexawugidatenak.weebly.com/uploads/1/3/4/3/134338825/377f0f5b.pdfIn PDF document text
    • https://vexapezerizerup.weebly.com/uploads/1/3/4/7/134717078/6633690.pdfIn PDF document text
    • http://thietkevanphongvn.com/kcfinder/upload/files/82995551076.pdfIn PDF document text
    • https://fagozozefixus.weebly.com/uploads/1/3/4/8/134846406/loselud-vasokum.pdfIn PDF document text
    • https://mixuzurul.weebly.com/uploads/1/3/2/3/132303374/2808905.pdfIn PDF document text
    • http://cmsdoc.blum-group.de/data/cmsdoc/userfiles/file/wekufomebixubof.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/83097322839.pdfIn PDF document text
    • https://fuxuwalanad.weebly.com/uploads/1/3/4/4/134487417/pekakobepepano_munisuwojak.pdfIn PDF document text
    • https://vurutosefitipa.weebly.com/uploads/1/3/4/4/134479444/vitasopivemuje.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/paxikif.pdfIn PDF document text
    • https://bametijabazi.weebly.com/uploads/1/3/4/0/134041776/wajira-toboz-ledugavola-rurokokofe.pdfIn PDF document text
    • https://fotinodonana.weebly.com/uploads/1/3/4/6/134692009/41a1aefeca.pdfIn PDF document text
    • http://chestheart.org/assets/ckeditor/kcfinder/upload/files/xibusixurubawe.pdfIn PDF document text
    • https://sujolatako.weebly.com/uploads/1/3/4/6/134624807/29c521dee.pdfIn PDF document text
    • https://wilunozuwi.weebly.com/uploads/1/3/4/4/134432110/8143912.pdfIn PDF document text
    • https://ragaz.co.za/YmrXLWy8?keyword=hyundai%20sonata%20workshop%20manualPDF link annotation
    • https://sowikidorazeku.weebly.com/uploads/1/3/5/3/135306740/5023553.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_off0000bad0.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000bad0.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_off0000bad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 10908 bytes
SHA-256: 556ca9e03b63165e6e534e348ac3d5479d5ebcfbbacfa1928805c740f67cd27d
font_02_sfnt_off0000ebf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF6 16616 bytes
SHA-256: b7fadf93171654b0b90f6880951c8abd07a0aa845c51e25f515f96e2e4f79b4c

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