Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a8ecacbbec9a93…

MALICIOUS

PDF

87.4 KB Created: 2021-09-03 22:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a0957640f74edcffad70940811617cb8 SHA-1: 3b636e4b832761cf8079a323ca4521eab1d7822c SHA-256: e5a8ecacbbec9a935f45910586596fde5764214e465ea7d69b40a0626933d3ea
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was detected as a phishing trojan by ClamAV. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

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 https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/9dd66e704d51185844ca990861c5c481/kosibojerowetiwaboxizor.pdf In PDF document text
    • https://shatalarab-llc.net/userfiles/files/bowokawofebitozimuxa.pdfIn PDF document text
    • http://ellev.fr/upload/files/88184705675.pdfIn PDF document text
    • http://hotechike.com/files/files/80007557267.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/mezufisamivizuzoto.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/41f1a579440f02e63a3c7c7bd2c5b91f/kegasifuxukeso.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/3f822e8d4fb8295d1f07760b5afa313a/nesigevawoku.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/5jg3p2u7uum9b8hobe9emdi7sb/94946118954.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/4212994919.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/37647070952.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/zetimowikaleb.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607580ffd4fd8---setati.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/37596924319.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/vawapadonobusomexa.pdfIn PDF document text
    • http://camptagola.com/clients/66689/File/79284838410.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fc4e03c0d---63303373076.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/masune.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/rpkiad65t9ill65998nlemfcjm/40032878661.pdfIn PDF document text
    • http://ozcetinler.com/userfiles/file/kojovojuden.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/paronukefuvino.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/34470529981.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/legibujamifexodovuzorawub.pdfIn PDF document text
    • https://epiphanych.com/images/file/zaruvidirifeto.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/vudawibefuvibujekijegemon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=list+of+all+countries+in+the+world+with+flags+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_off00010474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 11044 bytes
SHA-256: 8afe14fd5c9ca7b6cd986aa1bcf5b28cb2c7bb7844bde548dbe97bb04e603f06
font_01_sfnt_off00011df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF6 17944 bytes
SHA-256: f28c5a2d9dfce42261d4fa1806b48880cf47e96084aceb2305d4d7febfbd902a

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