Malicious PDF — malware analysis report

Static analysis result for SHA-256 9270e7754b05a2f0…

MALICIOUS

PDF

80.5 KB Created: 2021-05-21 08:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 796f2fb7d10dd5189744cd0d817348bb SHA-1: 2413c1c675a1b3a4bb75e642ad243bf1420d2c0e SHA-256: 9270e7754b05a2f02150465200e1e4f6affdb828a13151b3a57a3be3742343b4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a phishing site, disguised as a job summary. The PDF structure itself is also suspicious, with duplicate object definitions, suggesting obfuscation or manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/strik?utm_term=job+summary+chemical+engineer PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fddba34-2836-46a5-8904-7eb1e5568f23/42870547933.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/82209005171.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/57402545647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a85702-eb93-49e0-9612-0cdd3e80cb7d/66724163911.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/como_descargar_musica_gratis_al_celular_sin_virus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7dd10b-a6a0-4b47-ae1c-13031afd4156/39424830353.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/value_education_meaning_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e19ad18-ac86-42a0-a0df-7853a018ad28/sony_str-k750p_speakers.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/2606719513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321eab88-f66d-4157-af94-699ed3010a82/xuwewuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19154c7e-89e9-46b7-823f-9a48a3aa30a7/how_to_identify_liftmaster_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fc93dc-ca22-4ed2-a48e-10d5e6536d4e/whirlpool_cabrio_dryer_making_loud_humming_noise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f995eea9-19a6-4f59-a277-9b5c61974954/nowuxisopavokatugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6ce063-804d-4b1a-82d5-57eb504fb814/46074349384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cee45e3-5a9f-4fa2-852c-6b096abb2d60/bissell_little_green_machine_turbo_brush_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efaf4686-984d-4104-ba90-204d3f8580bc/segizisovotul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4d18cb-10a8-4377-9aba-99f14e362a05/how_long_does_it_take_to_regulate_a_diabetic_cat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ab8a0d-f765-4837-a7e7-6c7e08f025d7/82564321790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4892bb52-3021-421f-ae7f-a24614552c1d/33560249491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14391d75-5c92-4a2a-bd3c-e0f7f2097436/coby_mp620-4g_media_manager_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9001851c-7875-476c-9d7d-867abddcecd7/39795861283.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/programmer_analyst_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/sentry_1250_safe_specs.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_off0000fc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 5444 bytes
SHA-256: 4c9605497c7624f3126486520465e2b83c58b35d358264e479cc96ec321d3f83
font_01_sfnt_off00010e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8B 11156 bytes
SHA-256: 8931ca7ce0a62b694f59ed6f3628c5ac56611be128330b66eab15af359de7127

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