Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e384d049c5ea70…

MALICIOUS

PDF

79.0 KB Created: 2021-08-15 17:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: cd08aa61ff4d8f8fbf09b41a9a5c8f9c SHA-1: cc96cc5e566ba744c4f78e099b698eb13eec8f80 SHA-256: a6e384d049c5ea70ba33b7c48f2b4f5edd536b4e6e473b97c58e9b1e82a21563
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or utilize disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to phishing sites or potentially download further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4958

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://quizai.com/uploads/files/27398825708.pdf In PDF document text
    • http://stlnsk.ru/uploads/file/fuvugoduxofefinadivat.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/japesanevuzaxol.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ludez.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/fadulafodeze.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/59db92895ca0b3b412d017dcb89bbc99/9784714899.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/74223011933.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/29125232248.pdfIn PDF document text
    • https://alohasafaris.com/files/9528945919.pdfIn PDF document text
    • https://kultmotor.hu/images/files/rajulenaz.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160805a7b5838b---dumunurojir.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/39741649972.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c0bc3ed6d---delatemakazobolepa.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d341587ac---32972622322.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/40765835976.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3b71af07f---poxuturu.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/d4e05d7241495e7a77f7d1463ac3dc69/joferekere.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b79e515aca---zovepatesebofowagen.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/63689d90315229f557c3c1a9814680fa/68993012324.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34915774170.pdfIn PDF document text
    • https://codecs.roimages/file/26561928475.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/16789517690.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c70d08dca49---pemokakiluboxav.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/b18ec88fd89fe55ff6726f9953538bd0/miradozinixiliwosilisupib.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/sofararamafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+retrogressive+metamorphosisPDF 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_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 10608 bytes
SHA-256: bf9a0b99b334060b535178491adc41975e7cfa045e0d3de7e0d24e7242bd2e93
font_01_sfnt_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1