Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8d4303b0cf173a…

MALICIOUS

PDF

85.5 KB Created: 2021-10-20 04:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 5bc166d269104f6bdf87c2493861511e SHA-1: 26ed1a4ff42e27f059a5d8809213946faad8ed6c SHA-256: aa8d4303b0cf173a959d909573872d3a9d640e5ec7c7910ed0c33825a29cd298
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://la-klamm.org/Files/files/82859397159.pdf In PDF document text
    • http://kzlo.pl/fotki/fotki/file/suwutunedupugukawojexedaz.pdfIn PDF document text
    • https://freeunlock.com/uploads/file/89525060008.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/fimovipesufakuwakisor.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/15628862112.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/63930222968.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615fbf25cdbf1---75118082847.pdfIn PDF document text
    • http://bud-med.eu/userfiles/file/74207648930.pdfIn PDF document text
    • https://specializzati.tecnaevolution.it/dataload/ckupload/matisoporegifufazab.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/19nov9r3fs51h5nd4v2pilbd5o/nogewatuzofubuveloted.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/dalasofadufetexemevapuso.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/jirazojilotipune.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148038049ebc---lotadimugaxapajutipa.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/64234725515.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/f2g4ms88uo6ahgugcqhrs96src/lugasizofiropogeri.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/zapatizidamisizovipije.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/13449959391.pdfIn PDF document text
    • http://espace.peinard.fr/include/images/files/9981562779.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/mevizuzuninilen.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/60324400054.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/17638174304.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/39546269429.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/xotitoxek.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/45278451266.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/40567990176.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/RhDyTiV0TgQ/uplcv?utm_term=can%27t+help+falling+in+love+chords+piano+sheet+music+freePDF 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 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_off0000e3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 18672 bytes
SHA-256: ed85b0cfe97fef0d082a1448e8419df708520717e3ca15386c3f93492358fe9c
font_02_sfnt_off00012d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D29 11300 bytes
SHA-256: be98f69a1b8a382f5331876f4484e9dd2205aa4d1fea2e942198b081495eb71a