Malicious PDF — malware analysis report

Static analysis result for SHA-256 4788c5da5c6c7da8…

MALICIOUS

PDF

211.0 KB Created: 2022-01-06 05:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-20
MD5: 1814ce4332d8521674a6835b3fc5ef7c SHA-1: 550ae0ffcbd5ef94803489fec3a51fca4fb70ed0 SHA-256: 4788c5da5c6c7da8bf83528fe5baa20b4bb5df2e93971001520b6a6d278a6ea8
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8500

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://ketchas.ru/uplcv?utm_term=yookoso+answer+key PDF link annotation
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161a71a0a13713---gotuma.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/tejebizelobelef.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16142d7af4be97---69565377910.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/nitisonapizaterewumemudut.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/ij275n8vdugh02mqcqps84h9l0/83109886992.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/1762082536.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/lutejomokobewi.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/81006628604.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/monep.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/dde1de5fba9a5a35bf4493933dae084d/dixokezovogoxazadug.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1619e22a77fc31---sukaxago.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161c5d97d07a73---vizoke.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/77552878235.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/79196665151.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/xoxaraza.pdfIn PDF document text
    • https://primer-spb.ru/files/files/feselafusetinijelatowolir.pdfIn PDF document text
    • https://tigapilar.com/upload/files/86332600159.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/xagazebafepakivuza.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/lobibazafet.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/45709004104.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/fizevewusitelalesefita.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 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_off0002e191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E191 10140 bytes
SHA-256: d6c9174a3576a620aa42763752baa88956c8031329565409e504439b17b4f90d
font_01_sfnt_off0002f86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F86E 17652 bytes
SHA-256: 2a07239d521b383d0302c96a1804ea4f74008aa3381d99eacf586bf6d70dc913
font_02_sfnt_off000326a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326A0 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336

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