Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd5c393258242df…

MALICIOUS

PDF

69.7 KB Created: 2021-05-08 07:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 498df1817be08b0f8482f1cbf6623b6d SHA-1: 7811f7199affb1c9f4243b70adc379102166a332 SHA-256: cbd5c393258242df867aed28765b4802341cb7a36921aa46b424232b84a61f96
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, suggests a marketing context, which is a common lure for phishing attacks.

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://xezojetit.ru/strik?utm_term=mktg+1102+final PDF link annotation
    • http://begemot.space/percy_jackson_the_last_olympian_reading_levelqeido.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/why_are_my_apps_quitting.pdfIn PDF document text
    • http://mosquito.codes/308333917612q3zh.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/what_is_in_chicago_steak_seasoningm3is4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_6021f8cd4c9f2.pdfIn PDF document text
    • http://salimom.mygamesonline.org/bernardo_stamateas_libros_quererme_mas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368978/normal_6007a2cb99c28.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/sharp_aquos_remote_control_codes.pdfIn PDF document text
    • http://fkpravo.ru/xilupawinoxzs2ym.pdfIn PDF document text
    • http://wiinorama.fun/download_stickman_legend_of_survival_mod_apkqdu6n.pdfIn PDF document text
    • http://jefuvumerusew.getenjoyment.net/82702309674.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5fcbb2bf4fd25.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/john_deere_750_tractor_front_weights.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zurovajij/how_to_cancel_dmv_appointment_nc.pdfIn PDF document text
    • http://fukuselumetu.myartsonline.com/71948153109.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/how_old_was_timothy_in_call_me_by_your_name.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/65698017415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7486eda-5942-4c54-8210-3a8bf5d68814/51896862814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f991e46-20fa-4088-9cca-658ed03400b0/1666235060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d6f762-79c5-49d3-8a21-15d7eae20e25/suxukugoxed.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/xikinudakab.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/apa_dissertation_format_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3706419-07ad-44e6-8756-f85fc2aa6fdf/dowetukesipeneba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd09d95f-71fb-4566-9b63-87cb4fe210d1/factors_that_affect_density.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_off0000d41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 5056 bytes
SHA-256: 2fa744f4e39ca4310d2e76166d785f2da70a0881049b7d17daccb011969084db
font_01_sfnt_off0000e589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE589 10540 bytes
SHA-256: 831e296975f918e11bc39bb16e58ca947230ac2f960b8d31d4144239ab30df9d

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