Malicious PDF — malware analysis report

Static analysis result for SHA-256 45cc16c4f93302aa…

MALICIOUS

PDF

78.6 KB Created: 2021-06-26 22:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d11c3e81f74ef7ac50f217a7689ed501 SHA-1: d9121d256db91ace72f59da4a6448c8cbaf27caa SHA-256: 45cc16c4f93302aab6af549e3267a7cfe62619fbaeb6a9169f935eb7c6e35026
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised websites, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the PDF as a collection of links hosted on potentially disposable infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4ee6a70bc---duwitajuzanugixul.pdf In PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/90597041732.pdfIn PDF document text
    • https://isleo.com/i_photos/file/xojunefakivagatenepirix.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/23864877000.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16084b52be1497---8626457755.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083666a7954b---66514396806.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5787a92898615c67a0f158ce777d7633/29318782089.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/vamomejedotonarosetaba.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c3f6e2683---lodigijo.pdfIn PDF document text
    • http://scantech3d.com/files/94673349020.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/sopobozakekazevibaz.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/88070850609.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/bd64640952a456d3f7fecafdafd9f489/67244107668.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/0400c3182523ded3199fd0d2d3eba310/tetadulojepod.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ij6430te9hjl4fod2ioctdorm6/wedafepuk.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607176558b42e---pebok.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/lesalowuzibenupitizolol.pdfIn PDF document text
    • https://mytopics.it/uploads/file/gisezapenozugofekofunodi.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/38d8bcd8dbd90ac2f5357477d02a9b6b/85298049631.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/29329281511.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/d28ba0eabfc3a4379531a3bba1295110/pedosigurunejixelum.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/5dc6d8460c7eb0bf8f7f75141ace8f1b/xasepukusilesejuxuvutu.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/pasekobutifexi.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86f3c9f42---25480585107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+do+you+quote+a+moviePDF 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_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 16724 bytes
SHA-256: 36072cb92f5e042ca419b1d2fa26e9ee73d693e55c657d32022610b2fa2bf34d
font_01_sfnt_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C9 10492 bytes
SHA-256: 43b22da01ad78b506a9518fcd3ed475084f91aa160dfd2c49d560eee402afe1b

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