Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac25ee45a51ffcfe…

MALICIOUS

PDF

100.3 KB Created: 2021-06-30 12:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 18758699c24608ac0185339de28251c8 SHA-1: 241032ecc74a640c6fb960ee4e5fc07460fb3760 SHA-256: ac25ee45a51ffcfec864764a36a498466ea4ab7607724683f117486b15abedaf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into phishing scams or download further malware. The presence of multiple links on disposable hosting and compromised CMS upload storage reinforces its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://oniceh.ru/uplcv?utm_term=girl+scout+woodworking+badge+requirements PDF link annotation
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/78dst3qmrjjbf667kc44pi8192/50020765386.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16071f18f88653---pulusevofirazileti.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/931320552.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/81ege07ombpemgcf1mj51tc4ua/wulisonuzusin.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1621567445.pdfIn PDF document text
    • http://walker-doss.com/clients/4/45/450b4a4af5ff3f13851793278d9c7ef8/File/jadawanoz.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/27d7373d949c530d8c734959b4a280e5/37656843879.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/7c1593a39ad00a6243c1ad4748c77a62/61073045383.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/f57103e8ab719ce65edaab6d09f87c33/tagisugitujodin.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/84854540366.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/56179440704.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/a50dc4d83d1105c0a664e184d8a20b8a/82982691442.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa602a23257---96915275247.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/s5c6jjjr468hd3fvbfj19c3mko/jetotovegew.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/jabosefetisem.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160856131dd1a0---39195300219.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffa36dd1b9---jasulerabififu.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/92687413142.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bba007c96---96040671963.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/daronasagoradiledotumaj.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/73318809872.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/jisudi.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/48759725193.pdfIn PDF document text
    • http://namdolove.com/FileData/ckfinder/files/20210613_343806396EE30585.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_off00011f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001372e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372E 18956 bytes
SHA-256: 66775dcc1f8f421c138eebedd82427cbd8adb2ad23a8714361930257cfcc9155
font_02_sfnt_off000167e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167E8 11316 bytes
SHA-256: c2558ef76e3a2e126cf01fe00e399b2e0d6e4d2048b2682af6ecb7b374d9d65b

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