Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28e21f72d960633…

MALICIOUS

PDF

77.7 KB Created: 2021-07-02 09:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fcbca151ced69396cd1c9ca5b018c500 SHA-1: 749ed02eabf3e710131758f5987c3dd8024b86e0 SHA-256: e28e21f72d9606338dfd8c13ecb36069d20414162683c8a1e996863b7da30b51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress installations, suggesting it's part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://wastran.ru/uplcv?utm_term=how+to+eat+fried+worms+main+characters PDF link annotation
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/dfp6j9mfj2bqceujs97rdhn8tn/96419325868.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/jk2mjirg3vb6jpo4i58u8b0rp4/kurunuvujurarazopola.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/uqisobao0mrg3eg87dpa6t7o2m/20880591296.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/budawurugasu.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/mdhfg43oln9tkaingcs5rjjo03/tedunonanubasajixuzelazod.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c494e451c3---zesenej.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/nogunujizuwid.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6dd9028d6---61367990211.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/nudabugimag.pdfIn PDF document text
    • https://service-panev.com/userfiles/75095888812.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/26825442952.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/kowefufi.pdfIn PDF document text
    • http://llux.vn/uploads/files/latonawesukubovupo.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721427acb33---29489529102.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a41cddc9d68---wanizisumunu.pdfIn PDF document text
    • http://esistore.de/userfiles/file/89507429753.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/11747001528.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bf8955f31---gafejurulenuzijomade.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/53787025255.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/47478811695.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/6787726471.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a6045465c---60001474423.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_off0000ce73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE73 10772 bytes
SHA-256: 7105806dc26a257c8a6d91dc3d63478ef9a148994fd80c3d87d77c103807e122
font_01_sfnt_off0000e712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE712 16212 bytes
SHA-256: 85f7ca8a3c4d85487c4bee3d6874dd6483a61eec1a31ee3e108281815f801bf2
font_02_sfnt_off00011159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11159 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1