Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f637090164cffc3…

MALICIOUS

PDF

290.4 KB Created: 2022-03-20 10:19:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-30
MD5: ae0f8aec6afff6f4315b877d4b9e3322 SHA-1: 56422165b0bd7f4edb751479c28531cb75703ef4 SHA-256: 8f637090164cffc320354b6afc7f5dffd19c1b164231f7639842201e7336dc96
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7513

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 http://savalis.ru/userfiles/file/41747130692.pdf In PDF document text
    • http://lovesenergy.nl/file/xuwefovasavokevekolaja.pdfIn PDF document text
    • https://earhive.easyic.ro/userfiles/file/xedanuki.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/zoserivelejavex.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/zitisa.pdfIn PDF document text
    • http://revtechnik.cz/userfiles/file/48945808316.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/bewideferosoleretomiraje.pdfIn PDF document text
    • http://cosmosartinteriors.com/kcfinder/upload/files/pigavugilavibegugajojum.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/wibumikopaxufituk.pdfIn PDF document text
    • https://digiconelectronics.com/media/85685284157.pdfIn PDF document text
    • http://novyples.cz/UserFiles/File/viton.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1621a3f40e8f61---rumusexogupo.pdfIn PDF document text
    • https://www.jobswolf.com/app/webroot/kcfinder/upload/files/kuvakexasejivizafasudej.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/xirupet.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/tomidero.pdfIn PDF document text
    • https://dogudokum.com.tr/panel/kcfinder/upload/files/73810861510.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/bibatigitagosu.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16222b816b9d39---30426782880.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/46181083957.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/kisefivosizidenen.pdfIn PDF document text
    • http://www.banzolaassociati.com/gestlab/kcfinder/upload/files/wumotewitoxaluzuxoziwegon.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/zeranowegivowibimuwuwa.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620c677572780---75199640473.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/fezuvaresalomusewilefixab.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/bupopiwedawaromug.pdfIn PDF document text
    • http://cosyromania.com/media/file/96373263691.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/gowivizojevixiwagerawidu.pdfIn PDF document text
    • https://russiandance.ru/frontend/web/js/kcfinder/upload/files/76567402707.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/maxixox.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/7783967104.pdfIn PDF document text
    • http://elfobchod.cz/foto/Image/file/70904000930.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/gipodotowugogobirusuxebej.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/58645747704.pdfIn PDF document text
    • https://sunuf.co.za/XSRYdR1H?utm_term=cacheta+online+apkPDF link annotation
    • https://babamansurkurhuseyin.com/uni/yuklemeler/file/genabufowuvirufovano.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_off00041aa8.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00041aa8.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00041aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41AA8 10328 bytes
SHA-256: ac76f7edd9547de19c073ab5516d6d601448f44bf0e8c106b9c07b08edc2bbfb
font_01_sfnt_off000431dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x431DC 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off000448f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x448F7 18416 bytes
SHA-256: 9fa140205e5e1f2c79724cf0486768424e3a6658130c98e4655cced53c7e685d