Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad30709d48bd6dd5…

MALICIOUS

PDF

76.9 KB Created: 2021-03-28 12:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8834ec869421bf1aa4ad3daa4cfdfcc SHA-1: 2c1e5a721cb9c3eb6ed031afd8f925c06ec769e5 SHA-256: ad30709d48bd6dd592540ae33c900139dc7c5b93b92a6800eecd626d96dafc57
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for Pdf.Phishing.Trojan. The presence of multiple external URIs, including one that appears to be a lure related to 'correct pronunciation of words pdf', strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/123?utm_term=correct+pronunciation+of+words+pdf
    • http://zajilakofudo.scienceontheweb.net/moparutevaguj.pdf
    • http://blue-tick-central.com/for_cause_and_comradeshrpkc.pdf
    • http://dvertsoff.ru/how_to_adjust_a_honda_lawn_mower_carburetoro879p.pdf
    • https://cdn.sqhk.co/rutunidosaw/27iaycZ/fopidikuxadam.pdf
    • https://static.s123-cdn-static.com/uploads/4414358/normal_600450262d813.pdf
    • http://gigezesuzobe.getenjoyment.net/38788155081.pdf
    • https://cdn-cms.f-static.net/uploads/4445104/normal_60192611d2c34.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • http://student-yurist.ru/6987324102761yih.pdf
    • https://cdn.sqhk.co/zidezofa/XhajdVf/72888414085.pdf
    • https://static.s123-cdn-static.com/uploads/4391305/normal_6003546febe04.pdf
    • http://tezuveripoxub.mypressonline.com/zivanonokezidabugutebop.pdf
    • http://bibuzikufaje.mygamesonline.org/livro_materialismo_histrico_dialtico.pdf
    • http://liwitesuzemumex.sportsontheweb.net/biocombustveis_vantagens_e_desvantagens.pdf
    • https://cdn.sqhk.co/fegokirar/heCGcMq/carrom_pool_hack_version_mod_apk.pdf
    • https://cdn.sqhk.co/radofufalam/cjbjcha/8789052415.pdf
    • http://1fps.ru/sekebodowigoxakazigonefwdzfs.pdf
    • http://lady-bug.club/aplicaciones_de_los_motores_de_corriente_directa2cjg0.pdf
    • https://cdn-cms.f-static.net/uploads/4420434/normal_60485f258bb2f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vobuturinivi/didevamidevujatolexesi.pdf
    • https://s3.amazonaws.com/xeruxaxer/does_the_military_lift_weights.pdf
    • https://s3.amazonaws.com/medaliwifufugel/juegos_de_gramatica_en_ingles_online.pdf
    • https://s3.amazonaws.com/sirilagewuga/xegadapejimak.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0bb.bin
8fd2ff4c8a82978348c2ebdeed8288bd1718a3bc1799abc60861156522e43d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 5112 bytes
font_01_sfnt_off0000f23e.bin
2f63ca1f139c61074ecb7c976b33f2959dd3871a818522106cd70d5581b30efa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 11244 bytes
font_02_sfnt_off000117de.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117DE 4324 bytes

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