Malicious PDF — malware analysis report

Static analysis result for SHA-256 9412dc1cf6cba298…

MALICIOUS

PDF

81.1 KB Created: 2021-10-26 11:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 75745d281c6a7b70f7e1eb3a3d7b73f7 SHA-1: 2d54ef23e399fbb8a8dffc28fe855d762175c817 SHA-256: 9412dc1cf6cba298077a465eee8e96f4f8a84ecd8dfa59ecaeae7d3ab9230d31
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS upload storage, suggesting it's designed to lure users to malicious sites. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f85c3e391d---88462594044.pdf In PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/2fcff2e08fe07510161d8092515e48b7/pazidokudegudibisage.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/venomixajopaxarinifupu.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/52109550931.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1616dbce46c183---18335808569.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16144c3361ac00---77636799420.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/ponamaxawuvigadudo.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/98700649773.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/39a823462405eee584a957db4bba0bbe/54279304381.pdfIn PDF document text
    • http://kondicionery-himki.ru/upload_picture/file/jetewijito.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/jewezutitepo.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/18253158429.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16169104385f7f---kozisipixulajipim.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/16814010471.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/kudonirudorogeduzarupewav.pdfIn PDF document text
    • https://tarsiman.ee/files/file/38757103445.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/37023372839.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161675f3923e17---65888571461.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/8545e7dc626b1a8b398a96c7077b961c/84446516651.pdfIn PDF document text
    • http://mtt-association.fr/upload/file/7187024880.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/rabenesixavipowalufupepij.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/92485320237.pdfIn PDF document text
    • https://tckontrola.hr/files/mowutukukalowivigula.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/87733200354.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/xPAns0MRe5M/uplcv?utm_term=incredible+english+1+audio+cd+free+downloadPDF 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_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 10988 bytes
SHA-256: b53b9c88495fd369f7375c5b0b0e7d487261cb5a21d7a064937f1899e03fa997
font_01_sfnt_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10982 17440 bytes
SHA-256: 5293bbb2f5f8293639fc3724862d9bd7e769dc8b3e5e4721b8b087675129a961