Malicious PDF — malware analysis report

Static analysis result for SHA-256 42535d5870ffbf60…

MALICIOUS

PDF

375.5 KB Created: 2022-03-25 08:23:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 09c224842b491456184f40ca2b202810 SHA-1: acfd2f910bdfb8abde22e6a186b0b7d47a5952a4 SHA-256: 42535d5870ffbf60b21052bc4308e537975686f0351a4353730a9c8d31dc4ffd
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a compromised WordPress upload directory. The high-severity heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' indicates the document uses an image lure to redirect users to a phishing site, likely for free downloads. The embedded JavaScript and the nature of the links suggest it's designed to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6300

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lazav.co.za/XSRYdR1H?utm_term=2+vs+4+sticks+of+ram PDF link annotation
    • http://batterseataxi.com/survey/userfiles/files/jobob.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/47391632775.pdfIn PDF document text
    • http://sinbad.sy/admin/kcfinder/upload/files/mimegarujufogef.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/18973844852.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/zetomekabe.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/bamip.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/60517892610.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/45672536614.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/vukajikimotumozedefijo.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/162386ced23d11---talowaz.pdfIn PDF document text
    • https://www.starvisaservices.co.uk/application/elements/plugins/kcfinder/upload/files/zubofap.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/42283780423.pdfIn PDF document text
    • https://st-stephens-church.com/upload/File/fijotos.pdfIn PDF document text
    • https://cbmpolska.pl/www/js/kcfinder/upload/files/68866140928.pdfIn PDF document text
    • http://www.vizilo-vizitura.hu/admin/kcfinder/upload/files/23356727228.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/c8a91ba54f49addcd96e9f567eaf21d7/99715386738.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/jevazevibu.pdfIn PDF document text
    • http://jesupraguefilm.cz/pic/files/jefijakosadufubobagizut.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/162116906c8c68---lakurif.pdfIn PDF document text
    • https://www.reptrics.com/kcfinder/upload/files/lalutufivibegasidivoziv.pdfIn PDF document text
    • https://autoskola-scp.com/files/66979024766.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/162354f0812fb2---mibunarafabojugurolufi.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/zumolagijojitedegam.pdfIn PDF document text
    • https://rozetki.moscow/kcfinder/upload/files/logexok.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/lidipa.pdfIn PDF document text
    • http://www.colfacor.org.ar/administrador_web/kcfinder/upload/files/bititopela.pdfIn PDF document text
    • http://czyxchem.com/upload/files/36800950361.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2022-3-25/20220325073017808574.pdfIn PDF document text
    • http://ore-processing.ru/d/files/13826451598.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/navolutuzomipija.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/51901031837.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/2938919967.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/39202087520.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_off00056e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E82 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0005859d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5859D 18788 bytes
SHA-256: ec0813c24f53254bef26e9e85a42e9d669f66945d4466b53c7ec8519bfde1a4f
font_02_sfnt_off0005b671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B671 10472 bytes
SHA-256: f2511d86ffd17df17d6e931c266100d5dda4d6016ee6b1dc6cee011385195f87