Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c370a1a7c78d14…

MALICIOUS

PDF

70.3 KB Created: 2021-05-04 20:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03241360453ae707fae9dd5b3e05bd4a SHA-1: 2ce1975d1222e5f60bb5629bb78836e3847a46e7 SHA-256: e8c370a1a7c78d142e0d38df38d40af7039dbb71a1288066c16d9d182cf86163
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains embedded URLs, some of which are marked as unknown reputation. The ML classifier and ClamAV both flagged this file as malicious, specifically as a phishing trojan. The presence of multiple unknown URLs suggests an attempt to redirect the user to malicious content, likely to deliver a further payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/c4d4a0cb296dbd0f49f51cbc2e590748/334864370.pdf
    • http://jnnycc.org/userfiles/file/lezuwiviwakireremudozuje.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f66c742bc---jumobogokirutoloju.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160798bf728607---87681341754.pdf
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f684999d8b---31275720536.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7fihfso64hipdeo7lusqq0f96j/fikojego.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b83a547a---fobemimof.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/93beb506c668baf433e3a482278f165c/wexopobeberovisapajik.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160789c2aa08f7---wixezimut.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/887882eac3b974f6669abd8e1adc7eea/mutopoxupuxuwizezopakogu.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/5cc3a7dabc5af15b1264b91e57de3960/jigidupubekogipaxiwoxinu.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/3d02fb505c2c1b9ebf5cad79173cd7aa/20723183571.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752d371b25f---jobamoxisonatuv.pdf
    • http://matstravel.ru/userfiles/file/86254175369.pdf
    • http://renovator.cz/files/file/lijetugenutet.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/6708u4d2ve47tf9mikol7nbn8r/tipafut.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c97fca1aa0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=minecraft+full+game++windows+10+free
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d581.bin
3d5932130eb891d7f65ac7d82118c5f342936f6de2436a5d76b59510e200e87f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD581 5632 bytes
font_01_sfnt_off0000e8b5.bin
3af218e1ecac0743d67d7149d43df2fa01f23436473f4d0e73489d2922ad42aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B5 10432 bytes

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