Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff81d2be57b3d3cf…

MALICIOUS

PDF

81.6 KB Created: 2021-03-07 05:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de61c86ef83d442190224b1cdde23c42 SHA-1: 02d1242302794eaf678d07dc21137d07a6250c76 SHA-256: ff81d2be57b3d3cf797b6e074b7ad48dbd0f1f65e35702e9f936b5ddf6678efa
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to trick the user into navigating to a malicious site, consistent with spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=inamax+ac1200+user+manual
    • https://cdn.sqhk.co/takodabu/j2jcjbr/twitter_video_er_private.pdf
    • http://bluebadge-support.com/american_english_file_starter_teacher_s_book_downloadcucbp.pdf
    • http://50off.pro/419580039377v5t4.pdf
    • https://cdn.sqhk.co/kojetovukufo/irhj1gh/the_communist_manifesto.pdf
    • http://1xbet-sportstavki.fun/rdr2_side_quests_chapter_6ok63q.pdf
    • http://igcopyrightclient.com/74883624310rsici.pdf
    • http://5coupon.info/vikuxosky1y.pdf
    • http://frontend-developer-azaynullin.site/zavebiroale4e.pdf
    • http://imm-shoes2.club/dryer_sheet_ac_filteru60gm.pdf
    • http://it50off.info/nevegerv9bk.pdf
    • https://cdn.sqhk.co/laxefotogulo/gKifOgf/33345149626.pdf
    • http://fastpysystem.online/fortune_1000_companies_listyl3sb.pdf
    • http://igafnd.org/bram_stokers_dracula_movie_plot8c9w9.pdf
    • http://idealica-columbia.site/brotherly_love_stories_in_the_bibleabgrs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mixanaz/justice_center_reporting.pdf
    • https://s3.amazonaws.com/sinadi/jopomewikosawofuseg.pdf
    • https://85dd47ab-2709-4dcb-8335-2a0be56ef462.filesusr.com/ugd/76de1a_42ed475d384e48f9988ebaa48e483e2d.pdf?index=true
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_9e995bd028c944b5a4fc130a8b60cdd4.pdf?index=true
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_4ca763e775a0456c885ac8ac90a1224c.pdf?index=true
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_f14e891b7eff4bd6ad8c7cf4ab4af741.pdf?index=true
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_e981c05ce88f47e0915ba86f386e8836.pdf?index=true
    • https://s3.amazonaws.com/xufoxorog/bogorevobikus.pdf
    • 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_off000102db.bin
40c8b2e8ba9fa9a59e0334040cc464ada9e80a873fd418d6d086589b9b3827ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 5276 bytes
font_01_sfnt_off000114bc.bin
2fb231187817eb8f95f178d0807b8146a4f0cb959b95ac29f59cb0043205a5dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114BC 10660 bytes

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