Malicious PDF — malware analysis report

Static analysis result for SHA-256 1766ca447ee555fe…

MALICIOUS

PDF

86.1 KB Created: 2021-07-30 11:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: de42ea87f6aec30ea4b4b8dda890610e SHA-1: c3cf5c0bdea97708ecdade8ae1b62d80a227e02e SHA-256: 1766ca447ee555fee826a5950cec8e7f7f4bee310f4453eac6a3fb0d0275808b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm hosted on multiple compromised websites, aiming to trick users into downloading files. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.1304

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://gat-asset.com/CKEdit/upload/files/valobamebowivek.pdf In PDF document text
    • http://mosjob.ru/images/file/87923477754.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/damedup.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e66e3b602e---16380520668.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/7d2ehbmcq741ko1hkmr8qgjhc6/27831212475.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/762fe809588462acca886337ce711e12/43476309117.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caaa94effe---giwuxoxutuxezegelok.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/kotebujulugesatejatiz.pdfIn PDF document text
    • http://mospolytech.ru/storage//files/jagipetozugenitofewoziviv.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bb60df3ef48---logakaka.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/9fe0c64eea8b42250e90216ae747e08d/92183368592.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210726_910B88762715EAD8.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/0b68f7463576871ddaa316e5e6b1f279/70519280005.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/dm5rb031b4sh3als7cmfrg1ju1/24325051587.pdfIn PDF document text
    • https://securitydm.com/slicice/file/kakititabivomivuwa.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6ad880b44---80017743712.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/92086260129.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/3773a625d0891999c198c9f67322f9c8/nopoj.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099cf7f2d0dc---53590825835.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/efc0426613d1c0f283efe25d9ba3324e/24649373992.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/d93c245ed17c72de1528e522b34a6ca0/18455802752.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/netikulejimakovamubudajod.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16098460b3f34a---21240589250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+game+basara+2+heroes+ppsspp+ukuran+kecilPDF 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_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 18408 bytes
SHA-256: 0e3169a2561d998fa553b08a48cd60e24fa17b9e7f3b98fd1ad0f5635e7e4666
font_01_sfnt_off000120f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001390a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390A 11404 bytes
SHA-256: 56b2ff201fe10c84cbfb54a9164f0e0af5ca409e7df6afa4767fa0a920ff4bc7