Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb853a070a1deb81…

MALICIOUS

PDF

79.3 KB Created: 2022-04-24 23:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-08
MD5: 28b8e5a28fa99b384ed6796b5696dab4 SHA-1: 345e13358bf9eedeb3e137a93e25bba02ace2273 SHA-256: cb853a070a1deb8106cd0921817e9b591a33decde7b8a70bb77dfb3e80963512
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://megastill.com/uploads/files/98882816162.pdf In PDF document text
    • http://yule-sign.com/upload/editor/file/20220212194718.pdfIn PDF document text
    • http://pk.mo/userfiles/file/nafonefapep.pdfIn PDF document text
    • http://greenburysecondary.co.za/kcfinder/upload/files/favonuno.pdfIn PDF document text
    • http://atem.sciara.eu/public/upload/file/nikusanovakefek.pdfIn PDF document text
    • https://rikisefunem.weebly.com/uploads/1/3/5/3/135337995/7d230c2cb1a5.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/pexekotugudebizobe.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16225ee812610b---dewajefodidajosaregat.pdfIn PDF document text
    • https://zebaraxofalolal.weebly.com/uploads/1/3/0/8/130813897/58313.pdfIn PDF document text
    • http://bappeda-jepara.org/app/webroot/js/kcfinder/upload/files/fubovi.pdfIn PDF document text
    • https://dubarepexax.weebly.com/uploads/1/3/4/5/134586846/7291715.pdfIn PDF document text
    • https://sezazorafone.weebly.com/uploads/1/4/1/2/141284275/vinutexotuvu.pdfIn PDF document text
    • http://cee1968.com/ckfinder/userfiles/files/41260937518.pdfIn PDF document text
    • https://denuxikunoleluj.weebly.com/uploads/1/3/4/0/134018299/3562412.pdfIn PDF document text
    • http://servetgumrukleme.com/kcfinder/upload/files/vujarego.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/sevaduxuxowaxozefabuvul.pdfIn PDF document text
    • https://mazakodavowur.weebly.com/uploads/1/3/4/3/134335882/1783320.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/gekubinarupuvurez.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/javapobip.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/8799152319.pdfIn PDF document text
    • https://yoyep.co.za/YmrXLWy8?keyword=is%20army%20ranger%20training%20hardPDF 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_off0000d317.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000d317.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD317 10592 bytes
SHA-256: 96e841c93d338c79f6b0a289568d7473c43559eb091cf57d3b3ae0bbe9af3bb2
font_01_sfnt_off0000eadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADF 17012 bytes
SHA-256: 4511d8f7e5f2844391b5afbb8674a28615411e680a1596e91453ce1b21975f29
font_02_sfnt_off00011761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11761 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1