Malicious PDF — malware analysis report

Static analysis result for SHA-256 f872f358eec3de31…

MALICIOUS

PDF

71.5 KB Created: 2021-08-18 23:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-17
MD5: fde0bd865dc2ca9cc7e41ffb0ba8f12e SHA-1: 64ee51817a5d327297d3e38690c71c704a0bd94f SHA-256: f872f358eec3de310ded34b725d21af56553e700de4afa6ed53915ad5a235b96
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kazodekefi.pdf In PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/33271863003.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/84526326583.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/wosozovedotavikewan.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/69637836858.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/2k7bj4fbea48hr1uvqnjik2rvr/fodof.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c56bde64be---xavaloxamufep.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86f7b8d5b7---vafowaxusapanaxilijo.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/4c4d6e8faf35e2aef9d05eea26317a6f/59750435915.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/pomeberida.pdfIn PDF document text
    • https://people11people.com/uploads/File/54959285219.pdfIn PDF document text
    • http://www.siposferenc.hu/html/78804001456.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/fn8fb18kqnuhs2qhp96rdh3e40/44394998590.pdfIn PDF document text
    • https://cristalensi.com/public/File/lopeboxulerolumula.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/77589940642.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609458ac3383a---44228012499.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/35833332690.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/domopapelatilaxinemem.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/30580399962.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a8372c797---60841037367.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/90810378162.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/92936136512.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/80412794795.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/81778775302.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/26906189368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+pythagorean+theorem+and+its+converse+worksheet+practice+8-1+answersPDF 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 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_off0000b6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F2 14760 bytes
SHA-256: d611072d6034ae763bd8d6c51472463ee73b2b19efcfe43be763778cc4290233
font_01_sfnt_off0000dc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC76 11532 bytes
SHA-256: 4e2d514cf1ad25b03b5fc202fc7cc4e03757aa5a8ccf9d646b5c6b26901df812
font_02_sfnt_off0000f799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1