Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fee607849c720b2…

MALICIOUS

PDF

86.5 KB Created: 2021-02-04 07:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c0c5f9003df60a1b39f8543908f45e9f SHA-1: 129a79b16ffaa57da0d06d9c40298a922d8d3366 SHA-256: 3fee607849c720b25a4c2f1fc95754b5db2f154a57349a8dc0a5633bb54a583c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's content, though heavily obfuscated, appears to be a lure, likely to download a secondary payload from the identified URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/aws?utm_term=along+came+a+spider+sheet+music PDF link annotation
    • https://cdn.sqhk.co/muwazubivotu/h22gcHt/the_white_door_sarah.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415291/normal_6002dfad580b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472198/normal_600363496d8fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409103/normal_5ffc792daa9e4.pdfIn PDF document text
    • http://auto-fishing-rods1.club/costco_food_court_nutrition_chart4qk7g.pdfIn PDF document text
    • http://electrumwallet.buzz/76428485351oi5fo.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/beketajta1iy.pdfIn PDF document text
    • http://runolive.com/23702577846rmyg.pdfIn PDF document text
    • http://ontrade.top/vazemitosivusateou6oh.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/0hfYTgd/touchdraw_app_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_60026f96c276a.pdfIn PDF document text
    • http://bonboxstudio.com/zixatavv3vi5.pdfIn PDF document text
    • http://requiremcgood.com/pokemon_arcoiris_english_gba_downloab7t48.pdfIn PDF document text
    • https://cdn.sqhk.co/samumosoxivi/gggi3jj/boxibapalogufemovulad.pdfIn PDF document text
    • http://makedctl.site/jan_broberg_book5sezy.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/BR05ugg/5017909074.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/bitajemisajoz/emoji_quiz_bored_button_answers_level_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/fuvepu.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/analysis_of_algorithms_cheat_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB9 5476 bytes
SHA-256: 0c3e7f5bdd27b8b8bf7824776cbace5aed7f23464fdca289a883c12b945dfec1
font_01_sfnt_off00011131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11131 11188 bytes
SHA-256: a3a44cd8c8138f3f55f21d0e04cb1f95907ab1858af27c689564c671ec326f0a
font_02_sfnt_off00013746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13746 16100 bytes
SHA-256: 84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52

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