Malicious PDF — malware analysis report

Static analysis result for SHA-256 94109b16bbbdcc0f…

MALICIOUS

PDF

533.0 KB Created: 2021-12-22 21:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 32e8b75d60769098b78a8cf84ed15dcc SHA-1: 23d1eddfc7d9533d49ebc75acc2a66208139f56c SHA-256: 94109b16bbbdcc0fe39e23eb7205f88892fd67c58467ec3fb8fd9b649bc483a1
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure. It contains links to compromised CMS upload storage and an SEO redirector, suggesting an attempt to trick users into downloading a payload. The presence of a 'download button' heuristic further supports this phishing pretext.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4649

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 http://tfforming.ru/d/files/42246861679.pdf In PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/vizawulozesusatiwufo.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/56688795340.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/87522501989.pdfIn PDF document text
    • https://balticseaheritage.com/res/wysiwyg/file/rotiwininijodujapaxuda.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/99741253203.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/vudawirusujajadidawawava.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/gekuzeku.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/002155883445935756b71fe4420c75d7/65879097479.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616603fa3da62---vabozexifesatisum.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/6624892608.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/5330f30fddfbd9c86ef38f947bde9d44/18958561266.pdfIn PDF document text
    • https://assofmt.org/ckfinder/userfiles/files/bilalederujozasor.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/21052580028.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/woboz.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/dexebamut.pdfIn PDF document text
    • https://cristalensi.com/public/File/ramebokugafixapilofi.pdfIn PDF document text
    • http://fitviewer.info/files/file/59366357092.pdfIn PDF document text
    • http://underbutter.cz/download/foto/guvuxogosiwofodemilupigiv.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/56051521574.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/95532305071.pdfIn PDF document text
    • https://garmin2.ddbseven.cl/userfiles/file/82041380867.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/161a903bd9a0eb---26227285404.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161435c33ee50a---demofurawujutu.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/1hHberoKktI/uplcv?utm_term=google+docs+word+templatePDF 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_off0007e665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E665 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0007fd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD04 17900 bytes
SHA-256: f7c6d1d9343c1ca2e4606337e84e2d6a168469476fb3df5713ac2ce88762b1ab
font_02_sfnt_off00082b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B88 10788 bytes
SHA-256: e3a664238e531e0fd26d62c0bd8bf19070e597c1a0eed483ed7febade9bdf785