Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59cdafdb55cfdd2…

MALICIOUS

PDF

91.5 KB Created: 2021-07-02 19:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f19ce23cb9637486a7bbb04a9d8eed3b SHA-1: b227fa636da80b64dce468b72c9142a6f8f23882 SHA-256: b59cdafdb55cfdd2a5c5b708862badc1c2ef99472e1adb6160720cce8c375ae5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm on potentially compromised hosting is a common tactic for distributing malicious content or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://tsegypt.com/file/13131218699.pdf In PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160757b1b3e1a9---beziwasazimoronigodedibiw.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/kepomojobevob.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210622151849200.pdfIn PDF document text
    • http://isdoor.ru/uploads/files/muvipumu.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160708e4221e08---semajiz.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/6b36c7f6317bc6cc47c1014d8ccea07c/sajikavemo.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/f7a84b2e2fe258e91824960258cb994c/tesuduxapedotuwejazunig.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/6ls1bhv311lc417e495gqgvdhl/zusutoxis.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4ec907334---19750969085.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/vemewop.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7a60541fd---58137539909.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/39939493933.pdfIn PDF document text
    • http://asustainable.com/global/file/51141320581.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0ga5oshk56o9krs9ln2dg4qlb7/sujaruluzopalibufaronida.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160814e5c4c3b1---18759234757.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/dijotemo.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/56189492775.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/4jlec5t0htvmtstf57fhsn13tg/11688383659.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/76223272270.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/022dcc2eeaf5d7feb13863179b7a1352/3409615916.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/537657d4566c97ade185de4814743021/rofopepojemufawixenow.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/sodujefobuxumomatupifo.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/2570546865.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=realize+my+goalPDF 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_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5D 10200 bytes
SHA-256: 41ecd570aab6c93aad22b2d1fabd417a2410e4dec651077d69775328a4adb115
font_02_sfnt_off0001333a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333A 17124 bytes
SHA-256: 9427f486106ac254a8dced78b8c8e3b50ee750c06b385ba8b403b4bd1bd94a0c