Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afc285527d74b42…

MALICIOUS

PDF

99.8 KB Created: 2021-06-29 04:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: fa35ce74ed92b89216eab801e1764de4 SHA-1: 15d4fa4f4061498750f3e5f646fb720e11004af9 SHA-256: 8afc285527d74b42553a47e9839f2395910d0e2979a23cf825f409486911ba9c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7495

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 https://philabc.ru/uplcv?utm_term=resident+evil+hd+remaster+graphic+mod PDF link annotation
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/568ad837cd6e1c933e206fdbd91c3044/gopejokalapuko.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c948c850595---zevibilewanofiwekife.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/67118066322.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/gffan2k16nmliue3kffj3tlq02/83672106376.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/pasunivavazal.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/39057492457.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/q7ti7a8i39kro4l91r96mpem25/ledodujebinewojawujuzadij.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813bc82ca0f---wokebipavanugata.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736f5d89cb9---gumomefotix.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65663893042.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/83891805439.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/mj9s2ncp78kq5s4eritn5np5hb/xabaxexawimazaxa.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/pcgsnsk4qdorh3nkna7rosldoe/24060822391.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/715eee9ec3e74f4f69606831450bd958/zozegowejujenusofinirob.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/26298405917b1cdf8fc08f3f5588a4b3/22600936597.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210519074838.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/72bca11abe9de3efe506d9620d5478ef/moroguvudogitu.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb9106f51c---46506439236.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/020226474033.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/a5ce1694b03d0d81e22d41011e6a21d0/xukabojiguwupare.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b607b0c54e6---putujopupabi.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0dc92a108---nakipe.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FC 11072 bytes
SHA-256: 68cab1dfeb1b80efa12a1104a4e548d85020cd06ba9ce87a2280875b249a7e0c
font_01_sfnt_off00013165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13165 17356 bytes
SHA-256: 59f44145f8f0b2ecae828a3309b82f8772acf61dbea98dbe07b3de10729ac593
font_02_sfnt_off00015e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001768c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1768C 8568 bytes
SHA-256: 8d9d6f24dda60c4d55a9d57017e9098b6b29788bd231a36bdbe22c0f4bd7fdc6