Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8305450b2c4fab…

MALICIOUS

PDF

85.3 KB Created: 2021-09-04 13:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-07
MD5: 175d84f59f8b03034b0278a422cbb51c SHA-1: d2e37e20bc186c19efc9b6b4860674629de25dca SHA-256: aa8305450b2c4fab546437510e5398f3ffe8e0a14d790bacd2546b7636a3dca9
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=bseb+10th+model+paper+2019+pdf+download PDF link annotation
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc3807d90d---87913629577.pdfIn PDF document text
    • http://eternoohydro.com/d/files/76622219722.pdfIn PDF document text
    • http://jar-ted.pl/file/musajefidewoko.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210807190352112.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/nitamo.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb61f02aafa---59840967535.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/46219532953.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeb19225a3---63660656901.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/67967043932.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcb3c73a4b---naruvamigifalobovuvid.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210723_095924.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/nopavafid.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/36905661635.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/5c4fb8bcc5a6c96152361720147b1652/66845748414.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/68340264711.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/3380528625.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/74257745420.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/b2smpl3garpfkgbb3n5mgc85fs/bilomazelarufa.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49194dc957---wemedoxakozexobewunikarux.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/90501835447.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/sugaxiviwutunarenu.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714534068f2---fidanovoforozalagulojej.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a17dbbaf82---sonexe.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01dae25081---6713234856.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_off0000e54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54C 11412 bytes
SHA-256: 93631d7a8c84d605fec9a1bf93f276bd2774c78720049c241ad7d2a58ab962af
font_01_sfnt_off00010000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10000 17988 bytes
SHA-256: 2000143ac39f7c6ff0d469a84b0c33a8f2331664403c498484bb1fb9e8779f51
font_02_sfnt_off00012f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1