Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c87290aca5d5da9…

MALICIOUS

PDF

88.8 KB Created: 2021-08-27 09:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 7d6115fe7587095f159e1a8d6147494e SHA-1: eccfbb0d3332f67dbf435c5e64c57023970d7d37 SHA-256: 4c87290aca5d5da99056e2a7f6720cc1c08e86ebb93ae8489a7a489808630714
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2806

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 http://moscowfashion.net/content/xuploadimages/file/63492049469.pdf In PDF document text
    • http://bygreenpure.com/userfiles/file/64808818919.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/44560708998.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/tuteget.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b57a88e60---94165233990.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01aaa9001---7516148818.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112f5dd80e63---bokutowegezefusazi.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/wevejok.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/29398405573.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/72266986223.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/kivepizuridofofepa.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/63632426180.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/57246131065.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/4ba9e3091bbcf49537a616ef410b5853/turisumez.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/omgbel5nvdagd4123ebj9hc7nh/fojulawezadururalenik.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e93f575dc65---45184391097.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0f9385b704---logegegolasine.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c9154efa8---fupovoxikupiguted.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ba5f5f2410---pozomupinatovewigufozabos.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/zeteke.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/5ece46d6632f6cd41393c026301f607b/vofiworawo.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/dekozalevuzov.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/36172204064.pdfIn PDF document text
    • https://bliznacite.com/files/619631839.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/gimeligilat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=meghan+trainor+and+olly+mursPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED3 10904 bytes
SHA-256: 5d75d382d927af0609e1d435de1797acc80040906efa6e48e9fb24ca7eb8d545