Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d83b284b19a6cc…

MALICIOUS

PDF

72.9 KB Created: 2021-04-28 13:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bd3fa2f82b6f9a435068172cde63403 SHA-1: 93dc228228e02de1fed93572b257b2bc03106093 SHA-256: f5d83b284b19a6cce3cee7ebdca4fd02bf0cab579cd842ed9e373f4117cc45e8
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs pointing to potentially malicious sites, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087805f84829---vetowaret.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/56ibaqa9tecgvglnsceve786k8/biwepeli.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858f260417c---dedofagi.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/h0b78887d69clct50a50suvrhh/zuvemusimituf.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083072bb6325---nisokejegekitupala.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607331095a86e---gafamuzokozaxejedekavedi.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/677861bfe73063a2bcec267440a33936/99153376874.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077555fc027a---vamome.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/f4fe26182a80fde147a0289a7e3e19f1/sulunopi.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/nksnjt7aht6ltoib13o3ip87dkeb016i/naxusologozazepusutenenuw.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607d28c314624---9400721589.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec78978486---kabonafega.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/94tbj4p4um1j0b0cje1ang4a12/rosozapimezazijizaxe.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607310a9ab2b2---ledazipomipanek.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737172249c0---77834142121.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/hgv2n6shat8pqr1dms6oh6qvp7/28579478973.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081ae8ac17fa---mebidukereselodunu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=gout+diet+sheet+patient.+co.+uk
    • 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_off0000dea5.bin
d4e76aef35ea4414b13d24cd957e8bcc6759cc6ea46829254d397e0ba158a3a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 5160 bytes
font_01_sfnt_off0000f03d.bin
98f0d36d268568a47d35953c6db9d3205676103ad4a4ad18ac7f03f654d303ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF03D 10764 bytes

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