Malicious PDF — malware analysis report

Static analysis result for SHA-256 9413983c1a6a8064…

MALICIOUS

PDF

298.6 KB Created: 2022-02-14 03:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 8a22c5b0ef5bed7cfecff0ed735cc353 SHA-1: c82b70eb5c808e69d1c9757ff1583d7897b852ce SHA-256: 9413983c1a6a80643743d4ed4e4968b1ecd3bbb397797e7e4affff61e7420bd5
144 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a high-risk heuristic indicating it's a phishing lure for free downloads. The embedded URI and redirector point to a suspicious domain, suggesting the intent is to download a malicious second-stage payload. ClamAV detection further confirms its malicious nature as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6618

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.
  • 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://wirut.co.za/XSRYdR1H?utm_term=english+adverbs+worksheets+for+grade+4 PDF link annotation
    • http://dentherapia.hu/files/file/61013339084.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f48275c9cfc---watipudabebanopovevurinul.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/40073509608.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/bupunatewijuwi.pdfIn PDF document text
    • http://coumert.com/images/file/filin.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/jakepekimi.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/fujotemim.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/3838917946.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/41390204840.pdfIn PDF document text
    • http://planetpower-thefilm.com/plugins/kcfinder/upload/files/fidik.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/zipubukatamagidiluzalep.pdfIn PDF document text
    • http://atomicattack.com/atomic/fckimages/file/botofetuzarazelafobun.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/debopojadubatadato.pdfIn PDF document text
    • http://centronegozi.com/public/ponijusi.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/xevopesazilanuxidulafepa.pdfIn PDF document text
    • https://www.fsps.co.th/kcfinder/upload/files/44955275038.pdfIn PDF document text
    • http://nhakhoanhantin.com/media/ftp/file/74814643870.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/wikuwiweximukaxurafe.pdfIn PDF document text
    • http://jubangh.com/Upload/FckUpload/20220128file///rexun.pdfIn PDF document text
    • https://3redsquares.com/phpsites/vertical_living/uploads/file/buxatalozukasuzidozoxiv.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/91834968981.pdfIn PDF document text
    • http://tlcjty.cn/userfiles/aa/file///2513775731.pdfIn PDF document text
    • https://ka-base.no/images_content/file/nefimodidopezev.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f9b7f137ea1---49714649108.pdfIn PDF document text
    • http://motocams.cz/ckfinder/userfiles/files/xedavinozezogoxem.pdfIn PDF document text
    • https://lesura.net/userfiles/file/webiruleginazata.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/24057641616.pdfIn PDF document text
    • http://schunk-app.com/js/kcfinder/upload/files/bavukobutigefuluge.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/61422965150.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/muraz.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_off00043e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43E65 11076 bytes
SHA-256: 9bc45f5852b03e0357aaa0cfdb8e12ea50e5c2ee1dc69b7dda46f70d2e718672
font_01_sfnt_off000457fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x457FE 16836 bytes
SHA-256: 2546e4f78215bad4ef24d95a4f8f06182baf4f366b1d959f180ce4c04405f929
font_02_sfnt_off000483a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x483A5 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9