Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac28905a94ff8480…

MALICIOUS

PDF

345.6 KB Created: 2022-04-08 21:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-28
MD5: 1cb35774a40d5b8a3442d0bd39ce6fb0 SHA-1: 4aeaf55dddc78e3aae858799cab395bc2147e09d SHA-256: ac28905a94ff84802aade9338354044461d0c5a55d0d331a4cb8b26444da454c
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7036

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://fecuq.co.za/XSRYdR1H?utm_term=rhyme+scheme+worksheet+8th+grade PDF link annotation
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1622931fe7da1c---81201510441.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/44105981405.pdfIn PDF document text
    • https://vida.posilatko.cz/files/wswg/file/sigidivek.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f8c40a32d57---nofutugisiben.pdfIn PDF document text
    • https://studiopixel.md/img/files/vutobugopasidomanim.pdfIn PDF document text
    • http://www.shriramhariram.com/kcfinder/upload/files/jepekoj.pdfIn PDF document text
    • https://karadirivesu.weebly.com/uploads/1/3/1/4/131407010/tunokaxesubemat.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/javakivowozolep.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/30973220721.pdfIn PDF document text
    • https://tulalezosisab.weebly.com/uploads/1/3/4/6/134601470/0f6e8.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/6618924.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/5b8e4d60ca3ea7394a694db7e68ee4a1/nojijepibujibus.pdfIn PDF document text
    • http://laduses.nl/image/file/20936295080.pdfIn PDF document text
    • https://dibakojiri.weebly.com/uploads/1/4/1/3/141317434/gugobuvizavatij_gifat_mulajikikadoj_rodivefutobapev.pdfIn PDF document text
    • http://groupburuemas1.com/contents/files/41741898235.pdfIn PDF document text
    • https://xn--80aujdnb8a.xn--p1ai/kcfinder/upload/files/renuvurabotakem.pdfIn PDF document text
    • https://kajurizekevebok.weebly.com/uploads/1/3/4/5/134586758/nezevurun.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16206253ee87f5---64647053250.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/vufidawiv.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/18773227242.pdfIn PDF document text
    • http://test.currentaffairsfunda.com/assets/kcfinder/upload/files/53941694234.pdfIn PDF document text
    • http://atem.sciara.eu/public/upload/file/xuposivuzuzujabolagafu.pdfIn PDF document text
    • https://sekeratogo.weebly.com/uploads/1/3/4/6/134683690/2307626.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/69878746360.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/rugasisikexasazawisu.pdfIn PDF document text
    • https://nigenodesi.weebly.com/uploads/1/3/4/4/134480521/lebazifepuranijogo.pdfIn PDF document text
    • http://primewritings.grand-essays.com/media/uploads/files/zoxerokogemetikeniz.pdfIn PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/tedadawulasakox.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1622bf02b3337c---29868735660.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/85664975332.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_off0004f818.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004f818.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004f818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F818 11120 bytes
SHA-256: d4328d74859cc61ad982b7ecd92aa1f8466deae422059ec3f543e54a062150fa
font_01_sfnt_off0005120b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5120B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00052a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52A1D 17172 bytes
SHA-256: 2a21bfe71fdd0afb9f3bb05c514bc692529a15ff89cf444c5359e5ba45b94c09