Malicious PDF — malware analysis report

Static analysis result for SHA-256 e377fb539692acfb…

MALICIOUS

PDF

75.9 KB Created: 2021-04-02 04:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977749266c12d9d1d4e5caf4b7f2be38 SHA-1: b6d7ada26928d292044936ce7391802ad7ca087e SHA-256: e377fb539692acfb6d6035556560a58e410a171055ce011d9c66201d0b2e04af
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, indicating a high likelihood of malicious intent. The embedded URL `https://kuzutuzo.ru/strik?utm_term=how+to+practice+cultural+safety+in+nursing` is a primary indicator of a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=how+to+practice+cultural+safety+in+nursing
    • http://boothattendant.com/49513683298tkb3e.pdf
    • https://cdn.sqhk.co/kivipemo/uhaPgjX/fire_alarm_testing_report_format.pdf
    • https://cdn.sqhk.co/mudemodox/jXq04VS/the_weather_channel_directv.pdf
    • https://cdn.sqhk.co/kupodakojav/ctcgfcC/data_analysis_process_in_qualitative_research.pdf
    • https://cdn.sqhk.co/tozegatopaxu/ugjig3l/risufezepa.pdf
    • http://ndfnasg.xyz/doro_mobile_phone_for_seniorszxrfp.pdf
    • https://cdn.sqhk.co/puzonexus/idgehek/pezetitorozi.pdf
    • http://raisinshub.pro/62268920420mooli.pdf
    • https://cdn.sqhk.co/puxedimuwo/iiWjjhf/screenshot_recorder_download.pdf
    • http://lynciguest.com/474299688595ubl1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/378f710d-5ce9-4263-adc0-de92f19f5c4e/88091708841.pdf
    • https://s3.amazonaws.com/fedufiporara/rukododedinokijanisujer.pdf
    • https://uploads.strikinglycdn.com/files/2b7079e1-dd13-45d6-bfec-7f3d2d834568/cuanto_equivale_100_gr_de_mantequilla_en_tazas.pdf
    • https://s3.amazonaws.com/kumasala/alveolektomi_jurnal.pdf
    • https://s3.amazonaws.com/pokixovuxik/jebegasi.pdf
    • https://uploads.strikinglycdn.com/files/dd5a2032-e106-4b4f-b4c0-6cb4eee96756/casio_fx-9750gii-we_graphing_calculator.pdf
    • https://uploads.strikinglycdn.com/files/67e6a8fe-f259-4f46-8607-d8a21232fe01/how_to_lubricate_ariens_snowblower.pdf
    • https://s3.amazonaws.com/kodipopujufipig/60171096576.pdf
    • https://uploads.strikinglycdn.com/files/b36ec562-3d6f-4e8b-8a07-e4bd94907c43/how_to_unlock_a_lg_k20_cell_phone.pdf
    • https://uploads.strikinglycdn.com/files/2d672011-4603-4f76-88a2-4848f1e51f67/49281695852.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_off0000ec48.bin
b301590669e34990982e11a5a35bc3bc83cbbf90cc093ed3d1d9591c720b10ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 5340 bytes
font_01_sfnt_off0000fe9a.bin
9f2152019d715da2e0a49ba7bf595a3791cc884d089d8aff3492ea0dbf3707f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 10444 bytes