Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b550d8584dcbfd…

MALICIOUS

PDF

305.6 KB Created: 2022-03-20 21:10:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 8a2ba5f35fa05d969b4c98100cf003b6 SHA-1: b35aea044e887aa27c46e2273a251c97cd667e7e SHA-256: 88b550d8584dcbfd16c20fadcab573fc18812c331c9b5ca5f99d50f9a373c58d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9512

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://cafij.co.za/XSRYdR1H?utm_term=bienestar+animal+equinos+pdf PDF link annotation
    • http://stoewebdesign.no/userfiles/file/78900787681.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/gusibuvawuvawemapelak.pdfIn PDF document text
    • http://bebegim.nl/userfiles/file/vijivugisak.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/99174827669.pdfIn PDF document text
    • http://bjqyms.com/filespath/files/20220223210012.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/81708835712.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/623188cb36ff2.pdfIn PDF document text
    • http://aven.su/kcfinder/upload/files/26200672148.pdfIn PDF document text
    • http://www.adom.biz.pl/ckfinder/userfiles/files/10148424802.pdfIn PDF document text
    • http://journalstudiesanthropology.ro/adm/jsq/kcfinder/upload/files/49560622514.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/95547263939.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/89045899486.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/xupufupujovutewomurum.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/97899455110.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/samemur.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/lofuxe.pdfIn PDF document text
    • http://satexvernaz.fr/kcfinder/upload/files/saguxazo.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/lewow.pdfIn PDF document text
    • http://cftckr.marketsearching.com/upload/files/muzesapisejavamu.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_off000454ce.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000454ce.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000454ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x454CE 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00046be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46BE9 20004 bytes
SHA-256: 937c74688d6ff1031bbca49963f51805aaee9aea5c48665b2c75f49f7a952f00
font_02_sfnt_off00049f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49F08 10960 bytes
SHA-256: 547cf3faabbc582898c20dd08887782a9a59ae17c753a8e8e718827e4d0807fa