Malicious PDF — malware analysis report

Static analysis result for SHA-256 370eca492ccc38a6…

MALICIOUS

PDF

75.0 KB Created: 2021-03-14 07:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6b196d31e85a8ad39f98f1bcdb00bf84 SHA-1: d5db331649a5212ec060177a594a6b18856c6423 SHA-256: 370eca492ccc38a6509e2be8bc438e6e0727ac36c2debf37b1a09776fa8da39b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document contains a lure for remote support tools, specifically mentioning AnyDesk. The heuristic 'SE_REMOTE_SUPPORT_LURE' confirms this intent. The embedded URL 'https://resalured.ru/123?utm_term=anydesk+for+ubuntu+17.+10' likely leads to a malicious download or further phishing content. Although no scripts were explicitly extracted, the PDF structure and the presence of external URLs suggest it's designed to trick users into executing malicious software or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://resalured.ru/123?utm_term=anydesk+for+ubuntu+17.+10 PDF link annotation
    • http://pushbiz.fun/55271121769up0yo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_6041c34ab381b.pdfIn PDF document text
    • http://x-bionic.shop/android_9_dark_theme_samsung3k5e2.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/igic2Uh/sijegiwisekekuwe.pdfIn PDF document text
    • http://vujereki.22web.org/java_jdk_1.8_free_download_for_windows_10_64_bit.pdfIn PDF document text
    • http://milanomodaitaly.site/9500418444abay8.pdfIn PDF document text
    • https://cdn.sqhk.co/lirisakaxam/eKjdVjg/chemical_brothers_galvanize_free.pdfIn PDF document text
    • http://ravitidi.22web.org/13723584354.pdfIn PDF document text
    • http://nerroba.info/2004_jeep_grand_cherokee_parts_catalogoi5bg.pdfIn PDF document text
    • https://cdn.sqhk.co/famazipow/bibhgij/formbuilder_angular_4_reset.pdfIn PDF document text
    • http://rezisugamufi.22web.org/73611498345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485718/normal_5fe93bbca450d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454287/normal_5ff5d6613d1e4.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/zupenafud/jefigopewosegirelamiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/98423893310.pdfIn PDF document text
    • http://xulaxun.rf.gd/zabaso.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/3_day_eviction_notice_texas_template.pdfIn PDF document text
    • http://fobewejidopiwu.rf.gd/46359152671.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/vintage_wedding_invitation_templates_free.pdfIn PDF document text
    • http://guvivewemubalef.epizy.com/cathode_ray_oscilloscope_experiment.pdfIn PDF document text
    • http://vusolitadiro.rf.gd/chemistry_practical_book_class_12_download.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/18237211409.pdfIn PDF document text
    • http://dutuzapeka.rf.gd/the_monkeys_paw_story_with_pictures.pdfIn PDF document text
    • http://nufitexevav.rf.gd/nisigovigakotu.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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 5260 bytes
SHA-256: 973f82125f2f8c692b6fc061b1f2de704c63a61ddcef06ca6f1b0744c1cd1322
font_01_sfnt_off0000fa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5A 10584 bytes
SHA-256: fdc65a314f28425e62996f195caa547b6eed000d892bb6a2af4cafabb2de46a9

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