Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddee50b46b05c3c…

MALICIOUS

PDF

283.0 KB Created: 2021-12-27 04:31:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-26
MD5: 9034e764ed3ba256b494e098cdd4907c SHA-1: b6723b282c4e5f54d0251bfea83246984c0ed72b SHA-256: 3ddee50b46b05c3cf601fac9e63a74fbd24466adc2a042e5c779adb7cb3f0823
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9535

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://kieryk.pl/img/userfiles/file/mosipevelavezagitu.pdf In PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/gosusuduz.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161c1365a9312e---79073843061.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/603965320.pdfIn PDF document text
    • https://smilewax.tw/uploads/files/202110141159537837.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/paxapirujuj.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/nifixom.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/oopp2l4g3975ab8fcdhb053gl4/19709947532.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/4c69975123f817a32d63fa5ed9555628/lates.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/161891bdb91591---koxezedijukiwova.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/xawijibog.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210911005013.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/xuxiputin.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/lililepe.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/fiwujavado.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/38246251691.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/HKUGBsJGI0E/uplcv?utm_term=chat+message+appPDF 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_off00040789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40789 16016 bytes
SHA-256: 6a49a22364bd5fa64e122ecca886e686b65dba4f5ac56f7b9df85be95e76de2e
font_01_sfnt_off000430a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x430A8 10268 bytes
SHA-256: 403bd7002dad1ac3019178a70d4839d926d0e4a5d08214fb6a9e7373be865adb
font_02_sfnt_off000447d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x447D0 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336

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