Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a10b7eb01223842…

MALICIOUS

PDF

318.9 KB Created: 2021-12-20 08:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-31
MD5: f966dd73a91ee45470467e73e14e2e0c SHA-1: 032eaf08402a68f45b60b26092664f003b135a3c SHA-256: 5a10b7eb0122384228030096839ccc997efbe9bf16d2d48de5ded3292ab4e807
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7639

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fred-robin.com/ckfinder/userfiles/files/78320923045.pdf In PDF document text
    • http://thucancakoihikari.com/luutru/files/vagorugamisadezagefumeg.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/didogabijulivezirinib.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/tesozubarezabikudexusuli.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/tigipubigakofakewojo.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/jubugenosenanibafefus.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/45372377747.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/wulapusujemoxusezuwuj.pdfIn PDF document text
    • http://ukz-service.ru/kcfinder/upload/files/66821721478.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161b18628c8398---57698399454.pdfIn PDF document text
    • http://moristas.com/userfiles/files/6934154253.pdfIn PDF document text
    • https://infracsap.hu/files/file/87449625332.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/bajitixidaniri.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/kogatog.pdfIn PDF document text
    • https://greenlakecruises.com/ckfinder/userfiles/files/75690063353.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/61189119411.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/97089017923.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/9fsl9sjsk6h9ef4rt2n650ksfi/31579160047.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/66192164805.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/jupevatigojomaligiluse.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/37769114899.pdfIn PDF document text
    • http://105chers.netsociality.com/upload/files/44332412909.pdfIn PDF document text
    • https://roland-toys.eu/userfiles/file/41852416067.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/84711177264.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161bfe4abc4833---figabunamimibujizamiravib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/vItLtdF7Pec/uplcv?utm_term=klarman+margin+of+safety+pdfPDF 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_off00048f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F06 10948 bytes
SHA-256: 138e87b2d88664ae8111bae3eed189a6c6b48dd419a61b9987215ac279004823
font_01_sfnt_off0004a829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A829 17516 bytes
SHA-256: 771e23bcae07e5fceeb01f4bb8c6b3a200412e1466b242c80c7d4ab129d0e21d
font_02_sfnt_off0004d58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D58A 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336