Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0684586f28bec1…

MALICIOUS

PDF

73.8 KB Created: 2020-12-30 15:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 725838a90e44f2a262b052f72ff80a85 SHA-1: 17bbae64d7e2dbb3d90bfd48066eec6db1b1c08e SHA-256: 3f0684586f28bec1119b5348882ce73da7a6b24049b87cc78ae2db49998b998e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a ClamAV signature and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading malware disguised as school management software. The document body, though heavily obfuscated, contains text related to software downloads, reinforcing the phishing lure.

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 https://trafftec.ru/strik?utm_term=school+app+college+management+software-+free+download PDF link annotation
    • https://cdn.sqhk.co/xinulezebi/djctnxB/duxenapesotoxemenasez.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxisilogok/jahJs7B/bingo_music_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/fggOYBD/fetemafikifab.pdfIn PDF document text
    • https://cdn.sqhk.co/babonisu/jfigU2A/dvd_player_netflix_ready.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/BjbLYhd/my_lips_are_burning_after_eating_spicy_food.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donake/tutorial_excel_macros_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394458fa-9268-4bcb-9928-0edac3a9cfcf/jefokupikiviloketosep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be56d2b9-90d6-4069-8c0e-d4f0780d33a5/pathfinder_cleave_tree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7f89c0-0a1a-4b59-aa16-f9332194a349/75133485718.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/idm_crack_setup_file_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/xokotodanuwaxujorotiregez.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 5796 bytes
SHA-256: f85124f5a57a60263dfabe5d8091e83960d7953a5258e70f1dcfdb3919af7c0f
font_01_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 10676 bytes
SHA-256: e9daa3c0423612dadba9bce0bbb814cdd559b3e4f7828f2e9e11d31f9154e521