Malicious PDF — malware analysis report

Static analysis result for SHA-256 f878d77cf14c97af…

MALICIOUS

PDF

104.3 KB Created: 2021-07-07 15:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 6667b8719531d27a2513d2dee40054cc SHA-1: 827d607295f46c54742c24247b313a493be9c51e SHA-256: f878d77cf14c97af8b0ebcc0dd67951b05d827a305ce21657988a3d38610c3f1
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • 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 https://luminex.pl/upload/file/51253348288.pdf In PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/cc3d1ae1b1e906dcd717be81fdaca80a/49421849912.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606d884ce9768---2321360754.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/gapudoxenadoso.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/falasilijuzulu.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/depat.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c795b6206c4249e843e44955f1e24423/8103075239.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/qds2lv4ao2m2i2bc2km5ukkqn8/34420828381.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bde0822b425---17810910429.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/kidelujubobopepikidupunu.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/49956667152.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/kiwopajubujusetimarokorub.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/8de2f7822c9ada9a8b3840d539dcd776/65420076762.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608413d2b2bec---mezutuvotagi.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/2ttlfl06eshpms18f649nv8td4/55685153332.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607835d6cd4d0---64103992082.pdfIn PDF document text
    • https://patc.fr/imagesfile/dovapivekewo.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084f0a7942c2---7046706328.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160946116149b4---sudijixeforud.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/96799390361.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160716b4ee9bf4---subujilabuxegose.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607764d60814d---bojiwizutoridezesoguziti.pdfIn PDF document text
    • http://builderall.info/userfiles/file/nizonutezu.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/5918422157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=computer+networks+technical+publications+pdfPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b10ea275feef9af3a7373af4d093bbbf/76408660200.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 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_off00013226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13226 17928 bytes
SHA-256: 5b540661e5779799c29d31651c62fd419715788f72dd81ac4428f0902fe37505
font_01_sfnt_off00016117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001792e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1792E 11336 bytes
SHA-256: 9d7c0230d469469a65b9e0a299cc2d92f61707bfa0e60a60654de8c95175d3a8