Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b380b21e9d4c722…

MALICIOUS

PDF

101.8 KB Created: 2021-03-06 16:26:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40086bbcf05d33882ac91b91caeb9376 SHA-1: 2428531dd3bf603e126f318c593eb1e7203c8dc1 SHA-256: 4b380b21e9d4c722a61711b16b113271aaf5cefd5220c6e40e9eeafad2f2c345
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests 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=arcadia+tom+stoppard+analysis
    • http://generatorsale.ru/the_pilgrims_progress_summary_in_hindighiu9.pdf
    • https://cdn.sqhk.co/numorolele/dBlgdhk/spaceflight_simulator_1._4_full_version_pc.pdf
    • http://mebovedu.getenjoyment.net/what_protein_has_a_quaternary_structure.pdf
    • http://riragukigud.scienceontheweb.net/38596035453.pdf
    • http://securityverifiedservices.com/singer_stylist_534_parts_diagramohako.pdf
    • http://tanijijud.sportsontheweb.net/canon_mg3520_driver_canada.pdf
    • https://cdn.sqhk.co/noviraxat/pcjdhek/game_piano_lagu_blackpink.pdf
    • https://cdn.sqhk.co/dufimogemeka/gfyzJjh/89646908860.pdf
    • https://cdn.sqhk.co/ranetixeba/higCRge/space_harrier_arcade_online.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kitakilesa/13478321353.pdf
    • http://wififeju.atwebpages.com/mejor_app_para_control_de_finanzas_personales.pdf
    • https://s3.amazonaws.com/luworizesupox/nfl_power_rankings_bleacher_report_week_9.pdf
    • https://s3.amazonaws.com/satuja/63335557526.pdf
    • https://s3.amazonaws.com/lorifumofelu/jidavenajego.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/wobuvuvotutag.pdf
    • https://s3.amazonaws.com/sojenozap/30824220989.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_off00015318.bin
a8cf3df0c9264a07d6b7cd2030029e41447f55e37cded72321273a7bc70f7e42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15318 5308 bytes
font_01_sfnt_off00016518.bin
1148aaee19d0998d7455f1172f71813eb9a5649786a8a5ea27c7ace94a310a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16518 11072 bytes

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