Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd770703d3a2f56f…

MALICIOUS

PDF

83.2 KB Created: 2021-08-29 22:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: 68c565e9d0fd8ca681757618a973da88 SHA-1: f07343086aa129946b27dea4088714ef29790944 SHA-256: cd770703d3a2f56f27fcf780731a327f33b152291b9dd8aac511344d4f70f6c5
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://medvor.ru/uplcv?utm_term=toefl+listening+practice+test+with+answers+2020 PDF link annotation
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/a6e58616985d20057d63625f942305b5/42076899333.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/vorur.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/jamapanafamizud.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/robibexudizedotupafujojaj.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/26867667608.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102df303936f---95151111936.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/8057739299.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/n0hgs0ofohta7ql9o1cc8uf71s/74313455940.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/30228922115.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/18862692278.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/36908808478.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/78308326257.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b9c00c537---sawaxuradezo.pdfIn PDF document text
    • http://elitk.ru/_files/dovuwuzadi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/ede8501b1b4f0cbd222129ee7f69c20c/42804363965.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/82568397255.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/meririmuxosa.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/77984142783.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817739267d7---54155063339.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/3796084352.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077c1fb68cff---64563860999.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/rasanepivogazaxew.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_off0000dccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 11052 bytes
SHA-256: 53892bd455c0f0a5ffa6db1517d5e710565311748ad7960fdbb35a2c572e1e5c
font_01_sfnt_off0000f69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 18604 bytes
SHA-256: 1a07e59e61842551bce05df68bd4eb48e6ac5fec87778cb53bb241a8ae41ac35
font_02_sfnt_off0001267f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1