Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae169e6e55c62a5…

MALICIOUS

PDF

87.3 KB Created: 2021-02-15 01:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3f425bfc0928903f7f70c4975e6a5572 SHA-1: 86a1e3045099d8b7736c9e0b194b3c56a3b974e5 SHA-256: 0ae169e6e55c62a5f92334b9db2cf149d8429b9c982e5a5e16810f6e144aae76
116 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing a book title, suggesting a lure for users seeking specific content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://seumenha.ru/wix?keyword=the+algorithm+design+manual+2nd+edition+pdf PDF link annotation
    • http://kleomaften.online/mu_card_visit_p_file_psd4go3p.pdfIn PDF document text
    • https://zitavuzan.weebly.com/uploads/1/3/1/3/131379524/6191335.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/xotabamojupabawa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5febd5f2225a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408712/normal_5fcb60e74d848.pdfIn PDF document text
    • http://egosikenclub.com/nike_logo_guidelinesk9r4k.pdfIn PDF document text
    • https://cdn.sqhk.co/tepikipo/4lhhQgi/bible_word_search_puzzles_to_print.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383340/normal_5fec21abc689a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471230/normal_601b98b7160b0.pdfIn PDF document text
    • https://fifekususelamib.weebly.com/uploads/1/3/5/3/135349053/kekarowu-gofupolika-posisop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412403/normal_5ffd55886c31d.pdfIn PDF document text
    • http://arboozfilm.com/tefefufuxusewekesizerowaqumhv.pdfIn PDF document text
    • https://wemizufatevovig.weebly.com/uploads/1/3/4/8/134896488/minelevusadaxatemi.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/Yggl2ge/27296400182.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/fShh5jh/meme_generator_free_download_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/bjhjfSR/fikebiwo.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/murudute/vobikoduvutanadadiduwe.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/544688038.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/burakew.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/43253877557.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 8496 bytes
SHA-256: e582f77546e7608fa952dfba34b993df5171777368e48b8a90e8175c57e407cd
font_01_sfnt_off000115fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FD 5536 bytes
SHA-256: 6c057d907fcefed78428e7ae3e11c11b4b5e878bd30b9efca8850fc1247ebfaa
font_02_sfnt_off000128a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A7 10916 bytes
SHA-256: 6c373708bb7a72e53714e0df991d1359132d68f9cf16f8bc7366454b439badff

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