Malicious PDF — malware analysis report

Static analysis result for SHA-256 464a736d37276006…

MALICIOUS

PDF

76.0 KB Created: 2021-04-03 10:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 318c9991d4173716d9069be999dcc700 SHA-1: c2a3bc1fd6c3443e3efd82ed849a5dbe5ebdd996 SHA-256: 464a736d37276006539f0fe852730e8aef7af0e9c596b0ce3b14bfd1785d586d
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which is explicitly flagged as an external URI, suggesting it's intended to redirect the user to a malicious resource. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to maintenance documentation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=difference+between+preventive+and+breakdown+maintenance+pdf PDF link annotation
    • https://cdn.sqhk.co/lisakopew/fhf3ggv/push_payment_jenius.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_603cc868a92b9.pdfIn PDF document text
    • https://cdn.sqhk.co/tawavumazo/Vhh8ZoM/temple_run_oz_game_play_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_6059e8f3a7b19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_603d0c296cf40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454681/normal_5ff2282f92800.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/CZ8iaIl/video_player_hd_720p_1._apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427544/normal_60517213604e8.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/Vhdhgjf/microsoft_activex_control_pad_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_60396666ed771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408588/normal_60650121930a4.pdfIn PDF document text
    • http://biteroz.iblogger.org/84319268270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462681/normal_5fe8d4cba8e1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5ff0a63be0748.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/IYhfDhh/xudufitofurofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_60172d08eace7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_6027bec24aec6.pdfIn PDF document text
    • http://tunezazetadu.22web.org/challenging_perimeter_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_602888f85c1ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457577/normal_605224d9082e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wukefomirufiza.rf.gd/jeevana_bhalobasa_korechi_je_bhul_ringtone.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 5444 bytes
SHA-256: 691e0d5385566d1aa65cc0ed5b3d00e0c1930cc1951f6ac40880cc69c991b217
font_01_sfnt_off0000ffa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA4 10156 bytes
SHA-256: 140b0d8c966eda27e8e59655765033a50a9e86258f051d621492715f39a86377

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