Malicious PDF — malware analysis report

Static analysis result for SHA-256 107dc67007a679b8…

MALICIOUS

PDF

83.6 KB Created: 2021-05-27 15:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40647efb385f1d49776a3ca5e1bd55cd SHA-1: 8e19a1ba8ed613fd04af6abc36b8cce29e3b1c50 SHA-256: 107dc67007a679b8254074a330d559bb8321fbfb318dd2bab7849b7cd34328b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support its malicious nature. The embedded links are likely used to host or redirect to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8245

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://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd09ca8c45---darurifo.pdf
    • http://bjhtdszdh.com/v15/Upload/file/20215202216279467.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/7k51gonilveodhb12busoejh6o/nupapunewizudoxu.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a07be15aeb9---fowukusamexapajaw.pdf
    • http://oreade-breche.fr/userfiles/file/gugix.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/4o3ui5huj498nerc1ffm3a11p6/82759320119.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160770e4454161---jixerojojuwomadut.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1d0f6976cb97062ab9590f4799d60f49/11011272386.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9ae2ceae---majegakadofeb.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/43daecafb3bcf3d0f13350e1618ebf8a/gejufunosizuz.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/tpb5kqrl6jbnq7r8snkofjv64h/penopojenabi.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/q8q6bl5snsd2n7qb3pfb11t161/8432147413.pdf
    • http://charivne.info/images/file/bizixenoduxosonowar.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/27ae61d21dbc6faf7c9373fc34cfe7f6/16472498684.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/r7fguq2pjh7if1b958tf3b9a1h/30453733703.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=free+equivalent+fractions+worksheets+grade+5
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012482.bin
a658f1785b1944f99666680f07c28203741935c04e28eb005f37f604cc629579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12482 5704 bytes

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