Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0f207f7a576150…

MALICIOUS

PDF

99.2 KB Created: 2021-07-30 14:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 429e4b8f908bb80309f987af779a4855 SHA-1: 14b55aae4e393a86529fa07e09e78d7c2c8e82d4 SHA-256: ca0f207f7a5761508253f8ce8a7e9cea534d9e6c194fc3b059614abbc9fc6c6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/jc15ji30qcscqs6rfvp48c4064/lejolabuwugavororivewug.pdf In PDF document text
    • http://www.kickcommerce.com/userfiles/file/88573241948.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/19064582852.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a260a887ecd---97569315007.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/03a378b902dc2a8ae4115c0e13babf16/1112138165.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36cdf8dc09---purapulepudazek.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/tipuzixiruvirujanukavug.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/0fa462b153b3a47c7d7d4eeaa704494e/45144147825.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/19236329444.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/sijolutabibigafoxisul.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fbf468492.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160887b9b1dfb9---saver.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/21314953600.pdfIn PDF document text
    • http://www.celso.org/download/vozotitibimul.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/48009207689.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/89541544a3683ffdedca0c190a52267a/72203778709.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/25cd2dd661d35aea4cf587a77051ccb4/vadup.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/gnt3u9tsg1i6ubse9r8qu4mal5/wulukofogimisajibejumifas.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/tesufitajifis.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/78705766445.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0bf01f9c6---gawosaligub.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/87367118319.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cdc7226ca---62565826570.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/fb50a53d898ba54b9bb28b50be1d711e/faturof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=subatomic+particles+worksheet+fill+in+the+missing+informationPDF 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_off00011bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD5 17848 bytes
SHA-256: 889c428c49592af80ad3569b2f620a72cec9368b7872e306290b2e2caa579697
font_01_sfnt_off00014b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16348 11420 bytes
SHA-256: 73861c3bb73479c85c2c7e0cce4b44a608888d4af0ebf6553c34b91e099bea2a

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