Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb9a64082f09cef…

MALICIOUS

PDF

71.0 KB Created: 2021-03-01 02:19:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 452c3ef7368b60bf84b3e8756a716ab1 SHA-1: 59fdb51b76da10a181a87228632fd4bfbd5aa227 SHA-256: 5cb9a64082f09cef6d168d0d6e9a1ce0415dd578dddaf784c6d20db3edae0d8c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/123?utm_term=cuanto+es+un+decametro+en+metros
    • https://cdn.sqhk.co/pasezateda/hfgjwjg/stupid_zombies_2_apk_download.pdf
    • http://opros.xyz/singer_237_bobbin8crx2.pdf
    • https://cdn.sqhk.co/towitudamuga/iguhajg/dune_buggy_for_sale_ohio.pdf
    • https://cdn.sqhk.co/setinapas/jficjjq/49846505582.pdf
    • http://teaapple.space/lectionary_umc_20202mazt.pdf
    • http://akb54.ru/the_book_of_life_songs_lyricsdaloo.pdf
    • https://cdn.sqhk.co/zugeketinog/jhbcBp2/first_grade_math_worksheets_common_core.pdf
    • http://makamar.xyz/tegisunudovekiletumev9cpaa.pdf
    • http://help-verifiedbadgecenter.com/manual_do_mundo_curriculumhfvcy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wutejaxevewef.myartsonline.com/rowizejanud.pdf
    • http://gakilasefit.myartsonline.com/87962962936.pdf
    • https://s3.amazonaws.com/muwomapotumugi/38344129474.pdf
    • https://s3.amazonaws.com/buwosevax/hollow_knight_grimm_troupe_guide.pdf
    • http://vugoban.epizy.com/guideposts_writing_contest_2018_winners.pdf
    • http://jokubamobivavum.onlinewebshop.net/sat_hawaii_test_dates.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_off0000d6af.bin
d7f948932d76caf61cd83ec35933e7abe46d41e8c93f6bbf3c54df2a0981bcf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AF 4956 bytes
font_01_sfnt_off0000e771.bin
4855ac4a80cacb2669fae3792c32b028d3e6c6c322d9452d05b9d7263d5aefe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE771 11696 bytes

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