Malicious PDF — malware analysis report

Static analysis result for SHA-256 f991540d844b838b…

MALICIOUS

PDF

387.5 KB Created: 2021-12-22 12:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 33e08eaa8971fe25b35f5e4396abcabe SHA-1: fe045eb7cd8fd9a93919bcb58c61cca2e56de5d9 SHA-256: f991540d844b838b5bb08484b5ab6fc51ea0a12a295380f01f6c2a9160ae791f
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8234

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 https://coretry.ru/uplcv?utm_term=cae+exam+pdf+2015 PDF link annotation
    • http://topbondtape.com/uploadss/file/noxifemegurajeriluzer.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/17256592840.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/kobolovofufi.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/44218990040.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/kusuxojufapifobimitakeji.pdfIn PDF document text
    • https://tukangjp.com/contents/files/4308895489.pdfIn PDF document text
    • http://intelibud.net/media/files_manager/files/63332078109.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161417b4e4fea9---gerajivosogifuzotinigofoj.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/91d8abd798651a1387a9b274d1433ee2/sesinero.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/kuzirejurogafivav.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161526698d85a2---96251332076.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/nobejemarizunixuxi.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136fe13bc67a---28483733532.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/82962703770.pdfIn PDF document text
    • https://www.andys.md/kcfinder/upload/files/kidamubasodafojowepig.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/gadogaxe.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/wiwulexetawebim.pdfIn PDF document text
    • http://alkanboya.com/files/file///84939906853.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/fabanubipekogakiduto.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/70119809680.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/83692780985.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/jirufixadutulagokitol.pdfIn PDF document text
    • http://erpos.sk/data/files/marefilotukikuk.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/43170167899.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_off0005a7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7EE 10492 bytes
SHA-256: b6289a845fb5a2cfbc1ae5f60a93dfc6f9f17fffcb1419554d591ef2ca0c2c1a
font_01_sfnt_off0005bfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFE9 16168 bytes
SHA-256: ed6839a03a2c027ceac1f6dd6724d76b4e4de214b6e369c42aa3234e4a29237c
font_02_sfnt_off0005e949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E949 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336