Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8df47e5ba5edf3…

MALICIOUS

PDF

77.6 KB Created: 2021-09-04 06:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0af55c1dae14c22ad61315fdf1f3967a SHA-1: 2d7b2e8d30aecaac31107b3e51ad892284aefa33 SHA-256: aa8df47e5ba5edf380031ed0c7828df5e7852edd9e42425ae28ad2001401118d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution through these links. The embedded JavaScript may be used to further obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5003

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=ulhasnagar+map+pdf PDF link annotation
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a650c755844---fujos.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/11cd396cad030ca785930a8aeaddddde/mujekivarufaxigobuli.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16094df7d5b1cb---64156877576.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/42821880306.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072f82725518---vugegi.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/73368133826.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/80726014414.pdfIn PDF document text
    • http://sciattella.net/images/file/rubepuxililojasu.pdfIn PDF document text
    • http://phuongninhphat.com/uploads/userfiles/file/14993772222.pdfIn PDF document text
    • http://esangsok.com/upfile/files/39971549257.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/nuxexa.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/17557211559.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7129f2034---kifolejinurubaxuxulexazid.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/10208292958.pdfIn PDF document text
    • https://digireg.si/upload/xaxubifutogigij.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3a286bc23---18633895004.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/ziladumumozirijaluribal.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/3615367990.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a74e02ed31---petixewos.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b47fc3324---94180141466.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/2f7m00neph1v0stmamf26b1gva/73640428558.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/42b94587bb8eabe245ae53ddd244526b/navetajiminuwazugujade.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/2969651867.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/xavorakavezafetumidorozer.pdfIn PDF document text
    • https://cooperspick.com/files/17218211824.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/c6a1644e685853b692756f2307dea9a8/49812373155.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 21448 bytes
SHA-256: 7ab5cab19dfff33ddca29350fce25d0d86897c3b3582324f05e6fd264918eeda