Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8f09261e96b38a…

MALICIOUS

PDF

330.4 KB Created: 2022-03-06 17:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-08
MD5: cfbf35c58260fe53a1f731a11502def5 SHA-1: 5bc658bb23e1eda91566518a75c6c5e8388d7521 SHA-256: cb8f09261e96b38af0db62b4a437e4f0eccd3f0dc17d17abf9a03d50d3003b5f
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6819

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://mifuj.co.za/XSRYdR1H?utm_term=excel+vba+european+date+format PDF link annotation
    • http://qardia.com/uploads/vajituwitaxewo.pdfIn PDF document text
    • https://www.afsti.org/admin/kcfinder/upload/files/pepaviximosigog.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/55579130187.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16216b71732f0b---lebilumubowonarafesapemel.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/4611416298.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20220302094709_utvwjw.pdfIn PDF document text
    • http://support-cmu.com/filedata/file/jikixide.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1621bfbea96fee---zonigegezagatenotikilaf.pdfIn PDF document text
    • http://nahar-bd.com/assets/ckeditor/kcfinder/upload/files/11260123056.pdfIn PDF document text
    • https://www.trungtammaychieu.com/ad-min/js/libs/kcfinder/upload/files/6728855959.pdfIn PDF document text
    • https://labelmarket.eu/data/file/xetezimukep.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/gasalazebuvubapubiju.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/70417593179.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/rupukewete.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/57196457195.pdfIn PDF document text
    • http://omegabg.net/media/ck/files/vonexix.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/betevizaj.pdfIn PDF document text
    • http://zeci.nl/im/image/dadegimajujebote.pdfIn PDF document text
    • https://objednavky.dortovapohotovost.cz/obrazky/files/zugafadexukufabu.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/fuvikn5rbpt6itsleakt6mkilk/26404665473.pdfIn PDF document text
    • https://energooptima.hu/upload/File/87010818563.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/98077313279.pdfIn PDF document text
    • http://dejonghenico.be/sites/default/files/file/8579698919.pdfIn PDF document text
    • http://kotrackusa.com/fckedit_file/file///20220212_15_53_39.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_off00049b3d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00049b3d.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00049b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B3D 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0004b257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B257 16336 bytes
SHA-256: adf38969d40f501586e0caf93d33991e243baeeecfe575c4831cdbf64b7044fa
font_02_sfnt_off0004c855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C855 21416 bytes
SHA-256: 22ac02d0d3bea3492c5aa5fa6121c115c65c2ed4cc1fae80446fa53ac08f5b14
font_03_sfnt_off00050135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50135 10912 bytes
SHA-256: d425ea0fadaaa1bcd9bad8cf8107d53f0103d95fed7684b3092cf236a2dcc858