Malicious PDF — malware analysis report

Static analysis result for SHA-256 648545b7c272d896…

MALICIOUS

PDF

88.2 KB Created: 2021-03-14 14:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f29a92fed0271dc5c4f3421680f1088 SHA-1: 4b9850a19a6888c32b149ca70760261d1bb69310 SHA-256: 648545b7c272d896ebfbfcdd24e17332b29f32461de990f3bc4981ae688390ec
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'dafemum.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=infinix+note+8+price+in+nigeria+2020
    • http://wowofiluze.22web.org/bleeding_and_clotting_disorders.pdf
    • https://cdn.sqhk.co/xaduwudixum/kjfXBif/xukofajakaxukuvokid.pdf
    • https://cdn.sqhk.co/ganuniwiku/hdjgJdR/16443149532.pdf
    • http://seluluxafej.22web.org/airline_industry_research_report.pdf
    • http://fakurivevid.scienceontheweb.net/quantitative_data_analysis_tools.pdf
    • https://cdn.sqhk.co/pesegozod/chg40ha/kipova.pdf
    • http://veruvipavopa.getenjoyment.net/5638207261.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dumoripusino.epizy.com/tramontina_6.3_qt._electric_pressure_cooker_manual.pdf
    • https://s3.amazonaws.com/jusagi/parisian_how_to_say.pdf
    • https://s3.amazonaws.com/panokojol/akram_rahi_de_gane.pdf
    • http://jitawidavez.atwebpages.com/dibefepawemava.pdf
    • http://sofijorube.rf.gd/22843670036.pdf
    • https://s3.amazonaws.com/dazifozixawus/bikipap.pdf
    • https://s3.amazonaws.com/negonanopix/battle_realms_steam.pdf
    • https://s3.amazonaws.com/tuxutedi/nedusaliwugutadafobogike.pdf
    • https://s3.amazonaws.com/xokebore/crestron_tsw-_760-_b-_s_spec_sheet.pdf
    • https://s3.amazonaws.com/dipafuxe/best_crossfit_workout_leggings.pdf
    • https://s3.amazonaws.com/tometubufimopim/creative_writing_ideas_fourth_grade.pdf
    • http://nuwuzokapa.rf.gd/conditional_relative_frequency_table_worksheet.pdf
    • http://dapibudajemuk.atwebpages.com/data_envelopment_analysis_history_models_and_interpretations.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001006e.bin
1529a88f930d62b59cd0e3f8530f8be19ae9e2b5f7fb7d3acc18cde302816b28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 5448 bytes
font_01_sfnt_off00011316.bin
69d323ac7408d9779e430bace617cbe85a99181e2a26075e6e34c1aa092d73a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11316 11984 bytes
font_02_sfnt_off00013c0f.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0F 16204 bytes

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