Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21065e05b252c6b…

MALICIOUS

PDF

72.6 KB Created: 2021-05-16 05:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f40dd9366f79a9d6810d457dc2e6b173 SHA-1: 42b817b9f85cbe4bdac23946e83460da79aa11af SHA-256: a21065e05b252c6b52fd4008ebaf04a97e09c7c9b47bbeec2f94168051e42fe8
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and multiple other URLs that are likely part of a phishing or malware distribution campaign. 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 attempt to redirect users to malicious content.

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://botokaw.ru/strik?utm_term=como+saber+si+alguien+te+miente+wikihow
    • https://cdn.sqhk.co/visobipibe/hGoichb/72832207992.pdf
    • http://4gusevshop.website/joy_to_the_world_sheet_music_musescorecdljm.pdf
    • https://cdn-cms.f-static.net/uploads/4499995/normal_601f90cbe9c85.pdf
    • https://cdn.sqhk.co/rudugebakivo/gdTjVjd/puzulipukas.pdf
    • https://cdn.sqhk.co/dolitife/cRFjihj/clip_studio_assets_not_working.pdf
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5fd889cfad15e.pdf
    • https://cdn.sqhk.co/gitovera/fjbhdgd/99799237741.pdf
    • https://static.s123-cdn-static.com/uploads/4402712/normal_6008f571aa3d1.pdf
    • https://cdn.sqhk.co/fexilejedit/hbjfJgi/jurassic_tribes_mod_apk_1._2._11.pdf
    • https://cdn.sqhk.co/nisavivurefu/evifih9/room_escape_contest_2_level_46.pdf
    • https://cdn.sqhk.co/tokititagiwe/Th4sQuo/redream_download_mac.pdf
    • https://cdn.sqhk.co/bevoroxur/s6Hhghe/assembly_plants_near_me.pdf
    • https://cdn.sqhk.co/kabawamurelo/Wiafn5W/cotton_classing_chart.pdf
    • http://urologo.store/how_to_set_a_tork_timereiiah.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fejenijovekozu/julius_evola_revolt_against_the_modern_world_summary.pdf
    • https://s3.amazonaws.com/dubiditiginowo/fiio_x1_manual_espaol.pdf
    • https://s3.amazonaws.com/sisaxu/formatvorlage_brief_mit_fenster_word.pdf
    • https://s3.amazonaws.com/zijivevip/59422452770.pdf
    • https://s3.amazonaws.com/fixararololu/treadclimber_error_codes_h15.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_off0000dd06.bin
6b0eb25787cbf685285eb47833f56f373041a6e7aeae2d5771a8b614664c513b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD06 5300 bytes
font_01_sfnt_off0000eeec.bin
04fbdd7cd770ebaed70d89ff03550ec5fab4da3a56784398b92a4f61279f2008
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 11232 bytes