Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0415c0c188e89f…

MALICIOUS

PDF

153.9 KB Created: 2021-07-17 03:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f8e713bbd7f0ea2ab3639e4c94753080 SHA-1: 30b40ca4678ba905d4afe83a84c21fea92da9b90 SHA-256: 8d0415c0c188e89f48b6226aef600da3fea92e4811937873e98a5f4dac5c8db5
124 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ClamAV, and heuristics indicate it functions as a link farm pointing to compromised WordPress upload storage and other disposable hosting. The embedded URLs likely serve as a lure to trick users into downloading further malicious content, potentially leading to exploitation.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3563

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://oreade-breche.fr/userfiles/file/futavemujimadududamezoluv.pdf In PDF document text
    • http://arci-mp.fr/admin/File/52542103982.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/17616992799.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/50963651060ce7544272c2.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/35056780021.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/73894735e1df77a9e69d419df8f333e1/89854098571.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/61342970380.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0625c33d98---9388417380.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/56500919713.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/11086992815.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/goxewijaxasezariluxapuxe.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076037a648c6---92806956245.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a82426b2---zenitizovukitadofisole.pdfIn PDF document text
    • http://gtshotel.it/images/file/76742613559.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/xigirugof.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f8ff252ba---fosuvubowig.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/64750703859.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d21b08f3b0d---tepewenowuba.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e565e62adfd---24237122587.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/57212192325.pdfIn PDF document text
    • http://nfc.soo.jp/file/tujitafasapulitajavilopif.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/gazem.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/d76ede3657e0f4b60cc3b3630d825c79/xotusirejusuru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=barry+m+goldwaterPDF 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_off00022dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22DAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000245c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x245C5 10480 bytes
SHA-256: 51b8609acb78123c0f8475363e7fd15a54077b70a7620409c3f6087b1f6b4558

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