Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b9c8e0e64a5e3c…

MALICIOUS

PDF

375.4 KB Created: 2022-02-05 15:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: 56a73c6edc4ec1ac0fd5a961632dcf76 SHA-1: 00c16d265a50fce71f31f0cf3c2a350835a1744a SHA-256: a8b9c8e0e64a5e3cf51d307a58f4980d5714b8b1eec23c2ebe94528b7c11188e
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7188

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://sunuf.co.za/XSRYdR1H?utm_term=aspen+guidelines+for+diagnosing+malnutrition PDF link annotation
    • http://labotinnghia.com/img/files/76000108089.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/39022171594.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16192d32e35282---58145459070.pdfIn PDF document text
    • http://aweibel.com/Photo/file/firigodatematibikowonupu.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/buwugokokawedi.pdfIn PDF document text
    • http://chronoflex-dz.com/app/webroot/assets/js/kcfinder/upload/files/kekunexuneti.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/lowozebukisidoje.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614c3a1ab458d---dotuki.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/57244797386.pdfIn PDF document text
    • http://pwharrison.com/userfiles/file/48852120269.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161178e06efc0d---1234660344.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210823_FBF8945CA03BA08B.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/turuk.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/11364344837.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/wutefadejutotagawe.pdfIn PDF document text
    • https://prolinenergy.com/Admin/plugins/ckeditor/kcfinder/upload/files/voxavarize.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/bamawofegojolativ.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/99669595288.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/xufasoxunos.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/rirorewesezepiligisup.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/tadobezeviw.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/98546370524.pdfIn PDF document text
    • http://www.motocams.cz/ckfinder/userfiles/files/79365622493.pdfIn PDF document text
    • https://directglobal.ro/files/file/pubefope.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/rilelufoxutuxogizosub.pdfIn PDF document text
    • http://gdgom.com/upload/file/2111132244552002186t90dgd7dxhj.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160eddf4283073---dumexefamekexeru.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20220127214756.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/pikufatasujakodoruxifiwof.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/jazuzumesowu.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/16789812508.pdfIn PDF document text
    • https://www.fondazionepolis.it/blog/ckeditor_fullcolor/kcfinder/upload/files/95415920882.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_off000571b3.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000571b3.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000571b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571B3 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off000588d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x588D3 10924 bytes
SHA-256: 6b8ba53f91f0c259e5624c6afc7cbff0f5f0dcafa880b47a5261112cb06f6945
font_02_sfnt_off0005a1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1F0 17060 bytes
SHA-256: 73907924565d8fd31f3d39b3a1d7f0eb9693911f483b58fddee959e9cb41af10