Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9bb8d1914562eb…

MALICIOUS

PDF

59.6 KB Created: 2021-09-04 22:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ef7f3836cdb993bbfff00389cf544f3f SHA-1: 7b3bd78e04ea6f02023a44aa690bb4ebb2d0bdb1 SHA-256: ab9bb8d1914562eb452a50c5ed067558b66d5bf43bdf654c30e3615d929e1c0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to websites that appear to be compromised CMS uploads, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6992

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://hotel-la-licorne.fr/userfiles/file/80176907381.pdf In PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/resiuv94i6cmbn6srlrntcthrs/5240269452.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/72560970061048a3b9678d.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/25134323337.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/58980977534.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/48167099771.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/kozerisan.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077118588b11---razorajon.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a0617c5fa---piligoxofatajilogas.pdfIn PDF document text
    • http://pinxedien.net/upload/files/15164292954.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c420c2edc35.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/57094985420.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/92862961975.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/64496120656.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/keselot.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/joxewopazozeturo.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92faead5ab---ninewebexigopevu.pdfIn PDF document text
    • http://momsystem.ru/public/file/15895350342.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/ruvanudejitedenug.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/jusuzazoborodetoduponukex.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/0lt8uoobv0991eul1e61fm1d7i/jabumewuwe.pdfIn PDF document text
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/12903464205.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=gmat+quantitative+practice+questions+pdfPDF 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_off0000bd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD39 11084 bytes
SHA-256: c2854ac3ecbe8f5ae51991fc8b6624d1897867d8f8b018ba16422b3020e0a58d
font_01_sfnt_off0000d6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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