Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dec55a7d159bc8a…

MALICIOUS

PDF

75.0 KB Created: 2022-04-06 22:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-29
MD5: c03b9c7730ff08a7c8c75a61ba3a4813 SHA-1: 7860dc0e1fd13a871c31a6e3714d49906b9d99ae SHA-256: 4dec55a7d159bc8aa903373c34f2268978c2119d2b081920021c831ada56fef7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://naukriguru.com/php/uploads/file/lelipilevap.pdf In PDF document text
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/rutagoxipitovigagi.pdfIn PDF document text
    • http://matras-devison.com/upload/file/xuduz.pdfIn PDF document text
    • http://rainternacional.com/userfiles/file/14396906947.pdfIn PDF document text
    • https://gedozunirep.weebly.com/uploads/1/3/1/0/131070722/paroxazowerukamemu.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/69020378373.pdfIn PDF document text
    • https://kusebavizekofuk.weebly.com/uploads/1/3/4/0/134098677/2463725.pdfIn PDF document text
    • https://vexapezerizerup.weebly.com/uploads/1/3/4/7/134717078/1246139.pdfIn PDF document text
    • https://tolivamudolav.weebly.com/uploads/1/3/5/3/135389145/dabuko-dekep.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/xovasenor-mitaraz.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/4554600.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/af8a92b72de58a920eb8b682fc8a235d/47308841931.pdfIn PDF document text
    • https://nozudasukexip.weebly.com/uploads/1/3/4/4/134441991/soxebe.pdfIn PDF document text
    • https://dopotixoniwatom.weebly.com/uploads/1/3/1/0/131070918/bebamuxege_ruxemusipo_xitomixolivuw.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/67041567923.pdfIn PDF document text
    • https://sujeliduk.weebly.com/uploads/1/3/4/5/134584652/3932646.pdfIn PDF document text
    • https://rejuxugojovi.weebly.com/uploads/1/3/7/5/137512777/gonusifaz-wegafojog-nisepaf.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/82581797679.pdfIn PDF document text
    • https://kratky.eu/files/file/83162878748.pdfIn PDF document text
    • https://kizofirelurok.weebly.com/uploads/1/3/1/6/131606598/7363229980.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20220302040835.pdfIn PDF document text
    • http://www.anpamedical.com/kcfinder/upload/files/sinesidofafona.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/54099743340.pdfIn PDF document text
    • https://wirut.co.za/YmrXLWy8?keyword=dicionario%20portugues%20espanhol%20onlinePDF link annotation
    • 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_off0000bb7c.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000bb7c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7C 19592 bytes
SHA-256: b07709ce35c69f1ffc5b9235c15124bff8a4422a2ed9a4c22771596ba904895c
font_01_sfnt_off0000ebe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 10752 bytes
SHA-256: ec2253ea5586e11f1ff59ce6a2b421bb997f905a0b5287022db548a50163a90f