Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b8f74796144b1c…

MALICIOUS

PDF

316.9 KB Created: 2022-03-15 07:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 82fdf395666919255fbcaf638185d858 SHA-1: 64f962c1a4b4f14b03c9e34a3fe0a1a54109cd67 SHA-256: 88b8f74796144b1ce7913b494a0445da51da58110bbc179fb86d7c9dd6ae4825
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8405

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 http://microcement.ua/userfiles/file/42662496457.pdf In PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/onkpienm21i4bknnakbivfttfj/80617224100.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/fareresavujisef.pdfIn PDF document text
    • https://www.nutfruit.org/js/admin/ckeditor/plugins/kcfinder/upload/files/gibofijefiweraxupolu.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/3341348db5a9f081bde49efe2318e043/ribuxafogematawomu.pdfIn PDF document text
    • https://123natura.com/stockages/files/sevanogumebawul.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/suginejetuzibukedezuta.pdfIn PDF document text
    • http://sinners-party.de/media/file/foxadiletipeg.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/pigofuv.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/28372868076.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/81410461258.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/6dd6064434a1a0d641b2970373ed619d/tedukepobajof.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/162226dbb85569---76433832258.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/dupigugolesejidis.pdfIn PDF document text
    • http://mousike.it/img_ins/files/88014513850.pdfIn PDF document text
    • http://gr-chem.com/upload/files/tesotujidozemipi.pdfIn PDF document text
    • http://patrickstaxi.fr/userfiles/file/69763479321.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/40234409717.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/mebokaxur.pdfIn PDF document text
    • https://www.nutfruit.org/js/admin/ckeditor/plugins/kcfinder/upload/files/81457064034.pdfIn PDF document text
    • https://sunuf.co.za/XSRYdR1H?utm_term=chemistry+foundations+accuracy+and+precision+worksheetPDF link annotation
    • http://gutachterbewertung.de/userfiles/file/53218127184.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_off000480c0.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000480c0.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000480c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x480C0 18340 bytes
SHA-256: 2e7a4982965bd965dc2eb02328da2ad10ad7caa90f31387287572863f643ebcd
font_01_sfnt_off0004b14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B14A 11260 bytes
SHA-256: 20f72d1aa4871d85d65be30847b81f240b99837bb3eae416eb29bc46113a90e4
font_02_sfnt_off0004cbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CBAF 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9