Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa6e9f8f9e7a24d…

MALICIOUS

PDF

109.6 KB Created: 2021-09-04 23:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: faaca6b1339243501b22b36359fb4ca0 SHA-1: 77b09561ede5da13d16916b2b0270d506e3c4d07 SHA-256: daa6e9f8f9e7a24df2f54bb4f5bbf14f214528a82a4636f6e40407f7790c055d
154 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised WordPress upload sites and other disposable hosting domains. The presence of numerous embedded URLs, many pointing to suspicious locations, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7907

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://sherwoodchambergolf.org/ckfinder/userfiles/files/kupasaleduvimesiz.pdf In PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608768a03a9aa---73329180245.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dfdf61f91---37275324323.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/b25b93c648c06096e796ece03c539a78/fewekuwodariselejajerad.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/nevupotaxokedi.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/80139894235.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/89615f8aeb47eb64ad002268e3397f44/54423783827.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/wogilugitugalamiwewi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744b341cdde---41046666003.pdfIn PDF document text
    • http://mcalesterhighschool1960sreunion.com/clients/e/e6/e641a1dc2b4fc8b0483efb779338bfbd/File/dosagivujexokukosovikudud.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e19006e29b---47436520545.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083a687698c4---doxolako.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/rudabilebifere.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f58a02c5a79---mopesuwavisaxipuxebevi.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/gafeler.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/josifetib.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/9eglstdtdm6grobrbf54cgq0ob/gijaniwononegeji.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/31040120261.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/58798366354.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/u18glv82h50ph7sm6fvhv27nh8/53969063591.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/71472610241.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/19cshrclgmnm4as99k6f7a98fj/kadibetupogurobitedexez.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/gunaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=philosophical+fragments+johannes+climacus+pdfPDF 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_off00018f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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