Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8f6d2efd9f36bb…

MALICIOUS

PDF

325.7 KB Created: 2022-02-02 02:49:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: 242765cf5f75111b9b00f65dac5377c0 SHA-1: 3f935755a497fa9b1b68c07acfda5250a54e029e SHA-256: cb8f6d2efd9f36bb7e3849851d2a74b905bdaf8e842709491ef774be215d4dd5
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7397

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/37221767909.pdf In PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/jizuzugilatuvowopoz.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161d605e664757---74983935943.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/vogomexakoxemubavepaludi.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/xedoximofaporuw.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615ea5c57f991---wikivojukozub.pdfIn PDF document text
    • https://galafrica.actstudio.ro/app/webroot/ckupload/files/29012097143.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/nenubademetinisazo.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/tufomapinapubuju.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/97762888644.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161db1811c2634---16851717370.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/28760909020.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/13011076994.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/25268430220.pdfIn PDF document text
    • http://origo.ws/userfiles/file/34490357633.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/15705460949.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161a3eda8af8fe---fulanipuworeniminifu.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/gagiseniwavewu.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/60628625201.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/sinuxepu.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f237a57f73f---88331695373.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f417c4a4897---64159329776.pdfIn PDF document text
    • https://gatheritup.com/js/kcfinder/upload/files/87387960151.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ce9e98b2527c2c50d6ec312d9694a932/gitekikonabalagij.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/gizikuregemofanevumesutu.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b05689c832---70876743566.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158ca961f3e9---dusoraxi.pdfIn PDF document text
    • https://www.csorog.hu/kcfinder/upload/files/55626192790.pdfIn PDF document text
    • https://sunuf.co.za/XSRYdR1H?utm_term=dwg+trueview+2014+64+bit+freePDF link annotation
    • http://6nergy.fr/6nergy/sites/default/user/file/81768254703.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 extracted file (font_00_sfnt_off0004aa67.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004aa67.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004aa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA67 17988 bytes
SHA-256: 556e6071c7dad85476fcc8fe0fccf2a4c3d14fd05bcc14402398b5efca37684f
font_01_sfnt_off0004d784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D784 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0004eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEA4 10724 bytes
SHA-256: 72cf91f93337118f6e0c0843b9cf7d26abb1debd1b4a5db43761d292ee027a67