Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e6b26ace8fdf29…

MALICIOUS

PDF

70.7 KB Created: 2021-03-27 16:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 788b1a92b5a82172d3b5f2937e59b14d SHA-1: d57dc22cd56a37aba4bcbcac32dcee1f1f4ddc4c SHA-256: 73e6b26ace8fdf2983bef2db32780e9fa9c8b88f044c64cae7dc3fc5df827fd1
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://jacksth.ru/award?keyword=bnf+2020+pdf+free', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'Bnf 2020 pdf free'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=bnf+2020+pdf+free
    • https://cdn-cms.f-static.net/uploads/4369766/normal_60462be569fe3.pdf
    • https://cdn.sqhk.co/vakanaju/cEfiigf/sogebank_contact_number.pdf
    • http://sopesukenapad.scienceontheweb.net/sample_appraisal_report.pdf
    • https://cdn.sqhk.co/genopeno/ZjiEDib/busibigixisu.pdf
    • https://static.s123-cdn-static.com/uploads/4478655/normal_5fcaa71910ae2.pdf
    • https://cdn-cms.f-static.net/uploads/4416661/normal_604e5c0ba11e7.pdf
    • http://konolux.medianewsonline.com/66730941505.pdf
    • http://jekeluxuto.mywebcommunity.org/caractersticas_de_los_motores_de_corriente_alterna_y_corriente_directa.pdf
    • https://cdn-cms.f-static.net/uploads/4499317/normal_60209a46294af.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dazemi/5230782666.pdf
    • https://s3.amazonaws.com/loneminovu/kazikafugonamibifumozu.pdf
    • https://s3.amazonaws.com/jodabiladezot/data_encapsulation_in_java.pdf
    • https://s3.amazonaws.com/matogapibelifiv/the_dawn_dreamtale_piano_sheet_music.pdf
    • https://s3.amazonaws.com/fovezewi/62189156699.pdf
    • https://uploads.strikinglycdn.com/files/51003bdf-222c-40eb-9106-8b4c7e8beb3f/80144147863.pdf
    • https://uploads.strikinglycdn.com/files/6adac126-ee80-468a-a314-378496957116/how_to_connect_zmodo_camera_to_iphone.pdf
    • https://s3.amazonaws.com/ronenitevodo/weveromelo.pdf
    • https://uploads.strikinglycdn.com/files/779dc17b-bce2-4f20-b838-eb5a785c1983/paul_foster_case_tarot.pdf
    • https://s3.amazonaws.com/firudegix/xilawidew.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d85e.bin
75b3e933f362aab0f4a767a5399059e532eeca702f878aede6c584f4cb7cd5a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD85E 4940 bytes
font_01_sfnt_off0000e946.bin
d83c3168ac1c2979e809c44b441b015cc8c422fa8ff0980474952af521560de9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE946 10904 bytes