Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa816a57dafc005f…

MALICIOUS

PDF

71.2 KB Created: 2021-09-26 03:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 62a2a5c4ca6c97c461cacde043af1665 SHA-1: 57359896a9ce4c42786219c66368bd3004c040d5 SHA-256: aa816a57dafc005f1e1281a217485ddb1eb6ee2db2d12385f1e66601b4c3fa1a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://queure.ru/uplcv?utm_term=all+phone+update PDF link annotation
    • http://kwong-cheong.com/userfiles/zixepezoz.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/simefaxik.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/mexopojubagonogoranepovi.pdfIn PDF document text
    • http://hujiangsy.com/upload/files/butesovoterugufuw.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/78892436250.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/buzonufon.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/sufanaxu.pdfIn PDF document text
    • http://xhzhengli.com/upload/58415566291.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/91876803084.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/sumebanuge.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/53709736405.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/6120418099.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/24805119584.pdfIn PDF document text
    • https://aildf.in/userfiles/file/mukupiduv.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210925134735.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/23930873378.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/97a7790302acb3b291dfa99c505eaccd/33054165525.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/mepowebibogexuzuzimad.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/6359929744.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/87480259817.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/8490468077.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/sitirax.pdfIn PDF document text
    • http://micruts.org/userfiles/file/fimamogobu.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/jotena.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C3 10208 bytes
SHA-256: eabbc73ecd83f24052d72c7a93127ce0581b37b07e264eaef02925ef731689bf
font_01_sfnt_off0000ca99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 17400 bytes
SHA-256: 70143804303e1f48de6027927d03e8284af1d2ca118960899b8a04255e94d6cd

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