Malicious PDF — malware analysis report

Static analysis result for SHA-256 de443934d385eacc…

MALICIOUS

PDF

271.2 KB Created: 2022-03-02 06:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-04
MD5: b4472b6a6a8451bedc0f5d4e21e121be SHA-1: 51c3d6726664fe4a77f3b3186fdd197e4957a7b7 SHA-256: de443934d385eacc760748a4414f4054761529f9c9cefc9d6717c4051d180023
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is a phishing lure for free downloads, utilizing a redirector URL. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing campaign designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7038

Heuristics 5

  • 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.
  • 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://icoachyou.biz/images/ckeditor/files/40563079365.pdf In PDF document text
    • https://33mobility.net/uploads/files/70831266069.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/49450135119.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/31602136268.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/virevovokusubab.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/xizumuxiluxarekananili.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/96599357329.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16201d4d45b5cd---jiseduxazop.pdfIn PDF document text
    • https://varoslod.hu/kcfinder/upload/files/savefikibikegi.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/32483915915.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/45243107605.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1620c4946ef72b---xerupalilezelarexogipuzit.pdfIn PDF document text
    • https://www.hotelashray.in/kcfinder/upload/files/vulotatebuwoni.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/41667961648.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/76507508220.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20220219114756.pdfIn PDF document text
    • https://everestart.com/images/stories/file/20484865812.pdfIn PDF document text
    • http://www.alm-machines.be/kcfinder/upload/files/xinazepowugemilo.pdfIn PDF document text
    • http://herve-coiffure.ci/files/nidavamivivelagadijar.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/52828283516.pdfIn PDF document text
    • http://isped.net/kcfinder/upload/files/ferugexuza.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/sekijegogubigagim.pdfIn PDF document text
    • http://avrasyated.org/nedmin/production/ckeditor/kcfinder/upload/files/betajesogatexiwoti.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/73844651902.pdfIn PDF document text
    • http://www.ipsc-pv.cz/kcfinder/upload/files/32339788643.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/jojevoxirudebamivope.pdfIn PDF document text
    • https://mkontroll.hu/File/guruxakurere.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/8054125240.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20220213180414.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/ravurawevudivoju.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/20482561250.pdfIn PDF document text
    • http://iks.premoweb2.at/userfiles/file/61596524745.pdfIn PDF document text
    • https://cafij.co.za/XSRYdR1H?utm_term=a1275+transistor+datasheet+pdfPDF link annotation
    • 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_off0003ce31.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0003ce31.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003ce31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CE31 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0003e54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E54C 17804 bytes
SHA-256: dd0446fe39686181ef26dbc7ac9963ea4303e4b15502fef0184e44f9381d6490
font_02_sfnt_off000413c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x413C6 10884 bytes
SHA-256: 6fe451f50624eccb35cd551493e56f38ac3ce6144e8f8a123068e2ad93deda3b