Malicious PDF — malware analysis report

Static analysis result for SHA-256 552bc0f565a9a54e…

MALICIOUS

PDF

305.4 KB Created: 2021-12-19 02:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-20
MD5: 88c75e7bf7f0529d3adfc630a0454950 SHA-1: ece6de059455e60211dd67aee2c4be8ba7087856 SHA-256: 552bc0f565a9a54e912154acd994bc01ee6731bf2ca65f7b4938846c7e5534dc
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8383

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 https://kopari.hu/files/file/20408085976.pdf In PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/58833326697.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/68485087011.pdfIn PDF document text
    • http://copycenter.integra-sh.com/userfiles/file/56488319408.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/59895322598.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/2901016212.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/35859085337.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/moxavonetudamagimafexax.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/2ec7fk6i8rha7od3ahv2dv3c60/60054445875.pdfIn PDF document text
    • http://djpress.pl/Image/files/gaxifulebolebosuke.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/boxekeligilov.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ikai01pl822jnqnesf8oon6jp6/pefuxawufovujip.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/ralepowuparevazaxenu.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/7692725001.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/gezatamakuvonuxinireviwi.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/lolemedosukotafafeki.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161b9845b531ac---zuxuru.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/dupepakegat.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/22683032779.pdfIn PDF document text
    • http://zlobek.dinobajka.pl/Upload/file/83897683078.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/62000624725.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/sozusewud.pdfIn PDF document text
    • https://chcial.ru/uplcv?utm_term=what+is+the+unit+product+cost+using+absorption%E2%80%8B+costingPDF 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_off00045933.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00045933.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00045933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45933 10984 bytes
SHA-256: a8b5ec3b0f244872dc2a76bfc06b02b7c6dacb04390c4d399239cf9f8d793e9f
font_01_sfnt_off00047247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47247 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off000488e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x488E6 16720 bytes
SHA-256: 5bb4ff24b70227fb1c116347bd4663e718c8268c6c0660eeffc8253b8f86ceaf