Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46c2fc58576654b…

MALICIOUS

PDF

79.0 KB Created: 2021-03-07 17:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ede9c0405c3cba464b439705d35856bc SHA-1: 78ada41fd3e6798cfc95a301db0eb7d5b40f384a SHA-256: e46c2fc58576654bf91681df86c2fc6e7797b76d21aa742a76ecd655d2a9b223
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains multiple embedded URLs, including one that appears to be a redirector for a link farm, and another that is directly linked to a malicious domain. The document body, though heavily obfuscated, contains text related to 'Dental light cure price', suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://mezovuduw.ru/strik?utm_term=dental+light+cure+price PDF link annotation
    • http://vinakubos.22web.org/james_and_the_giant_peach_jr_script_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412896/normal_6031154505407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495681/normal_5ff4db7582f0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367937/normal_60058405ba08e.pdfIn PDF document text
    • https://weposatozexutav.weebly.com/uploads/1/3/4/3/134314203/143811.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5fcd312ca70f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_600bc8adc3757.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/5ee16c0833771f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xuboxigaxa.rf.gd/how_to_add_a_new_citation_style_in_word_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/161ab9aa-2cf7-4c7b-9dbe-69ff3b5526f7/69262264351.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/the_blind_side_full_movie_download_in_hindi_filmyzilla.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/sister_calling_ringtone_pagalworld.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_38424c5204eb4f49bc9869d27a0dce2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/android_app_obd_auto_doctor.pdfIn PDF document text
    • http://benobex.epizy.com/66257953046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6844a9c8-a9a2-4916-af71-5892ccaa1765/english_listening_books_diary_of_a_wimpy_kid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8603bf-e0c7-44a0-8b1f-6500d7fab9a9/flashlight_piano_sheet_music.pdfIn PDF document text
    • https://a3f0f489-8083-4a9a-8fa3-2e40fe1a5f8e.filesusr.com/ugd/39a0fd_4939f29764174b77b964b27d6135773c.pdf?index=trueIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_620fde02d35c4ae5bfc9f5f10b5b133d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf3f4da-66c2-402f-a084-3a0155b4de46/howls_moving_castle_book_wikia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bfab2a-4483-48ab-bca9-578e1a2d372f/what_temperature_do_i_cook_chicken_breasts_on_a_george_foreman_grill.pdfIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_4b3ba4dc70be4b59be3f69d6e84301dc.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 4788 bytes
SHA-256: 1cd8cfa9c8e78dd4362298f290cd85e638fb6e10027d84e74e6e5aa0f4a77e14
font_01_sfnt_off0000fd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 10448 bytes
SHA-256: e0bb57ae0707c6b35b446e99afe7421410d3b650b409c3e5454bb05f1dfe2703
font_02_sfnt_off000120da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176