Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af33becdacec628…

MALICIOUS

PDF

80.3 KB Created: 2021-05-29 10:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 971de813d500e2a0bbbf5ed607048378 SHA-1: b42787e5adf037bcb590278ee907804d9bcef0d9 SHA-256: 4af33becdacec628d9e9627f92fc77eabc3a1b339b5fddee9d6a4aa30098c2d0
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=and+install+adobe+flash+player+11.+3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421476/normal_5ff3fbd2b44f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5fd64ad07f527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_606e2a4ca1edf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f0f710-4b35-4c65-ae55-d68c4b598c26/vokowukawijupigibilid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f576c73-d627-44ee-b885-cfd77dfa33fd/harga_jam_g_shock_wr20bar_original.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e8bad8-a43c-431d-9af9-5ff90e0aab0e/nomotevepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13fbe805-d328-4802-841e-98d994a06303/popusupotagare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba077f90-eee6-473c-9b23-40b9afb620db/49884310806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd50560-8f8b-4ee2-b1d6-6d4a34689205/english_to_bangla_audio_translation_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40d3418-9360-4574-aa64-13eafdfff900/19628894645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ba0749-d65b-49ad-93c4-e8a02d356f69/fundamentals_of_digital_logic_design_roth_and_kinney.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c91103f-eeda-49ca-a6b2-a736d1b35f6b/finodiwabojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d33c5f8-afdf-4ac9-be89-30d14534b0c6/tewepubewet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a7c29f-c622-44dd-b719-f25693ca799f/gukosebiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cadacbb-d83f-4c55-be0d-3623b144d07a/fojimipizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf20b41d-f113-4586-99aa-3253c5d1c490/50007225157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f986920-c4ee-4889-8203-393552fbbf1b/koboxolujiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa40a6a7-ffcb-41af-be0e-bdaf23a3874a/helmet_heroes_cheat_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99f3eed-a6ef-4f53-8551-e3cb05b71066/how_much_is_galaxy_s9_plus_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ccbad96-69ed-4518-9759-00af37013c87/la_esposa_ora_por_su_esposo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1752003e-85ab-4cba-af79-aa0bf0884509/best_python_tutorial_for_beginners_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a735879-9587-4404-adb3-cdfcb67914f2/11520176579.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_off0000fc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC80 5608 bytes
SHA-256: 124d7d37d3b98cf81eb598ce3de3aa6273551a6a80187c138996da0c7175293b
font_01_sfnt_off00010f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9B 10692 bytes
SHA-256: becd90d270a281bc1629c7da8c587810c43ad61cbe4f6318259550e4dc8dab6d

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