Malicious PDF — malware analysis report

Static analysis result for SHA-256 340c63a73b3a8202…

MALICIOUS

PDF

84.8 KB Created: 2021-06-28 12:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b755a6f3601c66afca5a64f09ba814e4 SHA-1: 5f1b0f9af63f6464429f48e92003d087dfdb0b37 SHA-256: 340c63a73b3a82027e00a20ff09fd7f5eed8af1053d27ed7364ba20abc0222af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to websites that appear to be part of a link farm or hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://dianacb.cz/userfiles/file/83008224937.pdf In PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/51198059476.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210603_27EA1C906DD1D0E6.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/95277641822.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607030da99213---kaximasujuselulapuwuk.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/73658986832.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/4dabdcb5aa455341025c330a82282793/88864991391.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/danazevoxagasotogejide.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48f2a68d63---73149730760.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/c7b7e916661e29a9011018338d69be87/73421310102.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d91eeea37ab---4802637354.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/63911263480.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/46990928722.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/lorugenuror.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084fe6527e90---vexexulojavumetokobabiwu.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/kiduzimudobikarubadowalax.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/f667f996117104cf220898f5d0c714fd/navab.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/a3bd7dcc5fc65aa42480a2b8c2983f53/73918147980.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/10382386907.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/f43f3e8e5261aabee35e26f2d8490476/34055694872.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/sagowa.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a47e755d---befijigepixobiwiboropobup.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/49ugpf98861743dqa6i9d9rgle/jatoloromujagurukalaluwed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=calories+in+a+cup+of+orange+chickenPDF 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_off0000e84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84D 10884 bytes
SHA-256: 60e2aaa26e4f49f2e70b7c780a48707cebbffa4933fa93543119c2d14b65f50b
font_01_sfnt_off0001016f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11981 17048 bytes
SHA-256: 4b18d276184994d77f54c087817add2e0f0382fc212f82275a78304d3599bd75

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