Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d38e15f5ceda4e…

MALICIOUS

PDF

91.1 KB Created: 2021-06-29 22:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6af1e764873d0fae242fbb7d872cb848 SHA-1: 5adea99878dee8397c3b31ebbfdfdcf3e547772c SHA-256: 65d38e15f5ceda4e69707cc0b01fad22b3ab8facd6844ec05473fac3848a9d90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution attempt. The file functions as a link farm, hosting numerous PDF files on compromised websites, which is a common tactic for SEO manipulation or distributing malicious payloads. The presence of multiple external URIs and link farms suggests an attempt to spread malicious content or redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://leganordavigliana.it/uploads/file/8125629974.pdf In PDF document text
    • http://palenice.net/obrazky_clanky/file/moturatajawis.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ab76921792647ddffd25b3e2ed1b2df/roles.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/18625286951.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/mumago.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/fdca7c4e1bc6abf117c6de98b6218b8f/73217929828.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/blfr59pijd20sou8gu4d9nip22/49485178268.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/lozufazexuxox.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/37671144527.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/94488099746.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/85272011632.pdfIn PDF document text
    • https://agermag.ro/mm/file/12083331193.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/p4b5j0kmpsrckeolk4jf3n27er/60919362005.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/10/file/20210510_032509_132.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/9ee04d3a314cd2538485c7c210ee3784/vegonoledugokutifalekoti.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df72c83cb6---73744706747.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/4010f198c2876573ae716c7173b3a006/jefezolebifoja.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/lujuxusibu.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/rumabegabedefogol.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/20c0t0iag15t4ki1av9fkfpkf2/teluvidapizoxufevegito.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/91df22deb38bc9a00d8b9bbb94fd3b5b/82000712674.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/purojikufovabikegepur.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b22e7815bdb---46059764271.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/pajik.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/3eefae43e9e7ab2e779ea7ead6ca3748/12136228002.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/94055116885.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=verbal+reasoning+questions+and+answersPDF 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_off00010110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10110 17316 bytes
SHA-256: e41af70fad1c58935b14f4e17e9ee7eb84fe5a7afd8aafd35afd9a4da0036b2e
font_01_sfnt_off00012dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14601 10864 bytes
SHA-256: 73d78a2a4084f70f706a2f19bd923550f9297ca8c86f54da5fd3fd153fb61f9a

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