Malicious PDF — malware analysis report

Static analysis result for SHA-256 1416b2836face10c…

MALICIOUS

PDF

77.7 KB Created: 2021-09-06 20:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 781dc45d943765861fc6b66dd1b609a7 SHA-1: 787362f12094d0666379ce3f3ab03525d76fb6c1 SHA-256: 1416b2836face10ce2f366ddaffaa9b4596c64d4c37833dc81b5c3fec0fbaf7d
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

  • 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
  • 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://onmamtour.com/FileData/ckfinder/files/20210818_129F0CE68EB663C6.pdf In PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/modizoloxugiditufeboda.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/59594612659.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/70270925232.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/85fdbee78712e8060bc9d4e152deff72/lewelez.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16076ebd002f0a---82511091552.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/99961723459.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/d5bd54f2d2d22e998d24acc26d6c167c/faduwoj.pdfIn PDF document text
    • http://fedoro.ru/upload/file/kidasumufosodi.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/jefosazupopemep.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/18491125888.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/pavoninofixevadixex.pdfIn PDF document text
    • http://herve-coiffure.ci/files/68535575243.pdfIn PDF document text
    • https://qnzar.com/files/74431286141.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/fb7ac152b60f115543a3a954a53ce4bf/29113794944.pdfIn PDF document text
    • https://vestol.bg/files/file/jorawezemurosuseki.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/65314085071.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/bd7c4bc0de9e559f4ab451e385186876/buzejiwolox.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/79837241877.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/602f5c50953e4392a4e88c7b1945eab0/pewofamun.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607632304be8d---zizomutelimuzemugipiw.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/juh8t0olv770s5c49813set6st/janozilon.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/592e157a0b0ad008ac277487187537e5/38856450654.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/73618702205.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=press+kit+pdf+bandPDF 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_off0000e4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A7 18360 bytes
SHA-256: cf212cb7a7af3bc0f0e315ff37800ab64ffa54b5736cc5ff3cc72826acabcdad
font_01_sfnt_off000113af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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