Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5531cf5abcd1af…

MALICIOUS

PDF

80.9 KB Created: 2021-06-26 22:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bb6c269b62d8d7e1b2c2dcc1d834a50b SHA-1: 42c2b726ae2027a7ab2dafe0f445d8c7e0a8f4be SHA-256: 2e5531cf5abcd1afe94f8bb38b57414124f611509941389bfd1ef1c00b6dc2f4
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing or trojan delivery. No scripts were extracted, and the document body was unreadable, but the heuristic findings clearly point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/24867799b16a2bb36106b9cd75feeed1/72592183597.pdf In PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/mijorovudifakiju.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/0np29ut6d350dufq99spltuugp/14383301794.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607606f8ef951---37838029867.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/nizavurul.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080523e39a86---zivajokebopadokijasaz.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/1sue3m5lfv7pnagpe70nie0ve2/nikosilileruv.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ho417k07drqc95mm6fmil03dvm/66173799049.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b811e9e88ce---51732878997.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/seulhc77b88ncm6v62fv3aamh8/nuzevegumimesuvewigi.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/77dcb49b59079251abff294aebad49f4/24656683134.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/fefezane.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/d477u1juvnl8o27vtluis614ha/99225754501.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/25564318696.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/4f3dd204e103f74a195c7473c073f2b6/35535297752.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2d3867288---39880552901.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/31853544990.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840fd0d5d55---guputebapuza.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/81426998903.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/38162800703.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/mijileketodisubufo.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab0be1bae---defuzuxazaxazokid.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/73a5ffa290559fc7dd6d7c332024ffbc/fonumavodugi.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/cb9c2482268d16d5e08f56f13aada1d5/rubopifogegolisisos.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f06dc7130---jolonadaminosa.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c50e491253ca3da4bb6733072661244d/rejukebugoma.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b26dc886a---34413856138.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/01572c76c53ad4e272a84e4138389661/giluvivolugakekigowawo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+road+to+your+best+stuff+mike+williams+pdfPDF 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_off0000d798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD798 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 11152 bytes
SHA-256: f63f7c671969dcecb9110dffb86ef6005cd755b3ced887340171ed60da9e991b
font_02_sfnt_off00010999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10999 16796 bytes
SHA-256: 889595a892f7e11707b7ba19e41d48eb3a60f8aec843f0e88737fea7a2eb7e49

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