Malicious PDF — malware analysis report

Static analysis result for SHA-256 09507ba405424c31…

MALICIOUS

PDF

62.0 KB Created: 2021-08-22 03:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 83fd2d5edbbb80f59e6a3ade6e2d52d0 SHA-1: 07c9a401bb1790df55a6827d36305e625517fec4 SHA-256: 09507ba405424c311faf31618f2b0417ec3d0f5a6566c0aec73b959d4e356002
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9043

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://decom.pro/admin/ckfinder/userfiles/files/50677007801.pdf In PDF document text
    • https://oxfordjsr.com/userfiles/file/4474686365.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/juladulemadonereto.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/48957218125.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d4a4dd018---2017009423.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/9b4a64881fead521b2143714ca838c97/dejoj.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/8509270320.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d237ca20f3---33344076514.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/65922199989.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097bb588b81b---fibagajapatole.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/3fur4hpq7cq6elejsujloru8su/12793607124.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8565e73da5---74467873423.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/69ddb0ca7a7793d75f89e584fc50fd7b/jutul.pdfIn PDF document text
    • http://shiokuda1.com/contents//files/pobip.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/denafigafigupakukegowi.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/giregugov.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/zokakasuxasoxurejesa.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/25016562459.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ed3452d161d87bc4d0fc54eb06e2b9d8/36525916293.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/6418dfd87f228256975d3bafd66d49c0/bomamolaperina.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc752c9a013---litozizomoxiwiraxapaxo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607282565aabe---96460995944.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c80d2df45e---56370169478.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=cuanto+se+puede+bajar+de+peso+en+un+mes+de+forma+saludablePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67A 10968 bytes
SHA-256: de799d3d0b9b6655c031f04871bd80c936535c1db3308a893f0d30837df4df4e