Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ed0ca29e2f3cf6…

MALICIOUS

PDF

73.0 KB Created: 2021-02-18 01:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c529935c2c67d76698ca7dc81280497b SHA-1: efd75dffd2713771f12c41789fac5f754ace888e SHA-256: d3ed0ca29e2f3cf60bc79a8dd18e741675e74f75672761a8e6234d0b8c65a491
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript T1553.005 Security Software Installation

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate social engineering tactics, including instructions to disable security software and execute commands, consistent with bypassing macro restrictions. The embedded URL suggests a phishing lure related to a Logitech keyboard issue.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://leonvi.ru/strik?utm_term=logitech+k800+keyboard+keys+not+working PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459926/normal_5ff62153c4cd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420222/normal_5fd922c33ad0a.pdfIn PDF document text
    • https://cdn.sqhk.co/lutumodigi/Kgeghpw/modern_7_deadly_sins_list.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/hnhaHmK/how_much_does_centr_by_chris_hemsworth_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418170/normal_5fdfcb6dda506.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/gNhdige/s_p_g_ka_full_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5ff0ecf988e4f.pdfIn PDF document text
    • https://cdn.sqhk.co/makulowujip/iegjFeb/bbc_radio_1_top_40_chart_singles.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/jcgdcYC/mermaids_cast_in_pirates_of_the_caribbean.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/icnC3jh/verizon_my_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/hgiaSPy/buruxexozalujizalirugidal.pdfIn PDF document text
    • https://cdn.sqhk.co/rifibimilo/gggQaoH/falling_lyrics_harry_styles_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_601b4b7e61346.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawomo/g43IZja/how_to_put_slime_in_bicycle_tires.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/sixenogafopoj/cadweld_welded_electrical_connections.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/maboroxoda.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_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 5844 bytes
SHA-256: f9ab61445ebe949bc51997e7c8f1768838d2ed10acee795f31c9c3a3db52574a
font_01_sfnt_off0000f1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BC 10796 bytes
SHA-256: 7674833e828f65ca3704337accd51693b7dec96893d2b662523dcd4acfa3f404

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