Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be25a5789334e61…

MALICIOUS

PDF

87.4 KB Created: 2021-09-07 01:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 89d64c7674f31736e1509f47b83c8517 SHA-1: cdda16f27bec091c93b47a0daad160573ddeeed1 SHA-256: 2be25a5789334e61c8d4da475183e9567783e7674ce7e8b7f71bb6b4d422d944
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to further malicious content or phishing pages, indicating a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3704

Heuristics 5

  • 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
  • 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://activepymes.com/pub/file/19426855913.pdf In PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/700afd5ce5cb0e36b1fd8af42a450f6b/gufab.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/5862190486.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/87885036855.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160947ff5a7830---49245990086.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf3b82e2f---94080212883.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612973f9be089---natunawafadaxunav.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16107c215c664c---selimezan.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/lujiwonojizunejej.pdfIn PDF document text
    • https://parc-hotel.info/file/joxofonibe.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/remoroz.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/14589090717.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/didolapijadalerotevopo.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/23208478349.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb37a5dd4a8---6373315339.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/a1c7d43c96e5d05793d831df8cb6f9e5/kuwejomisili.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/vajatenobozekax.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607071134db3b---zipaxodalitevijukasuw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7aead352ad---vumoparofozopa.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/qqmd6okrej3e9fa60233i45g1b/zojugiwusajefasikejaxerun.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/lazokelaporakenizeda.pdfIn PDF document text
    • http://findusafranchise.com/files/files/20287793033.pdfIn PDF document text
    • https://avflash.nl/upload/files/buvanegozuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pg+trb+computer+science+study+material+pdf+2019PDF link annotation
    • 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_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 11780 bytes
SHA-256: f9607d310f6999f26ecc5aabf11006d6747b1f00e708f4cb71087f1857079589
font_01_sfnt_off000116fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 23596 bytes
SHA-256: fe583c606288e8104c7df67bf24dc2b680049e8d94d095b05c4b677e9163fdd1
font_02_sfnt_off000151cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151CB 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c