Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e94ede5931a34e…

MALICIOUS

PDF

98.2 KB Created: 2021-09-07 14:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 69f2bddc584d9f039dc1fecb501ab29b SHA-1: 77de9330a1587360d7fc6315d1369f9b885ba64a SHA-256: 89e94ede5931a34e09e02c2f0679d8507ec3030b553acc893096365c65645ae0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV, indicating it's a Pdf.Phishing.Trojan. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other potentially malicious domains. The presence of embedded URLs suggests an attempt to redirect users to external, potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4250

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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 https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/fd38ee1a3f0fa78e5b0af02c31aa555a/pufikosinaketotu.pdf In PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608690b133c59---88660526060.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0abe36c144---xarewifotikigivigalived.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/60311482808.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/2942322237.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/3bd50588682a28812564a7583d16104d/31625517730.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/vidakiva.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b564296059e---jewukabo.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb3acf166---86649073247.pdfIn PDF document text
    • http://charivne.info/images/file/gukulisol.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aa8f17ee7---57615022087.pdfIn PDF document text
    • http://industrialdevices.in/uploads/todununisegetugeviziduru.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a108c882af2---17945137402.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/9858569f75c28748817b2027204e3872/70945174140.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/239b973ee59da85775add499e24dee3d/18725165756.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/wozowoxamur.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/55f8b08f5f05bb68bfc2877f210f660b/56710068443.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/dusuvopifu.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/8270876704.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/zadetoxodepe.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/zijidikidujusovojig.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/novikekeguwenerisitudak.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/370c2ea56e2a655bb9e9637aace31543/6925318477.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613341b0b9a8b---47435269741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=emploi+du+temps+vierge+%C3%A0+imprimer+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C8 19992 bytes
SHA-256: 639d264598c05d1c239d7feda551836abb9aadf8d47cc7ca764c13871a33a842
font_01_sfnt_off000157e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E1 10908 bytes
SHA-256: 6e523febfb6a9eb806f3d88cca1b0af06301f2b98f21a8af0c24c6cceaf81c47
font_02_sfnt_off000170f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1