Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36d57d366a9323c…

MALICIOUS

PDF

67.2 KB Created: 2021-03-26 07:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc154526851712e9c0ffe2e250cade7c SHA-1: 90d1428c79778f7fc915766f853cf0a3ac2758d7 SHA-256: f36d57d366a9323c58c3aede84c55e979f161254353b550d9f57d7efa4037d51
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malicious redirection attempt. ClamAV detection further supports its malicious nature. The ML classifier also flagged this PDF with a high probability of being malicious.

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://botokaw.ru/wix?keyword=kate+spade+comforter
    • https://cdn-cms.f-static.net/uploads/4378834/normal_6054fbb07fc7c.pdf
    • http://twirlini.com/zoom_h4n_pro_4-input_4-track_portable_handy_recorder_with_onboard_x_y_mic_capsule_blackvh6e2.pdf
    • http://matteset-spon.space/91519796318fjulq.pdf
    • http://my-favshopg.online/can_you_get_a_new_remote_for_a_samsung_tvjh05e.pdf
    • https://cdn-cms.f-static.net/uploads/4454682/normal_60540a2ab4af1.pdf
    • http://rabota-plus.club/after_you_jojo_moyes_download6zb12.pdf
    • https://cdn-cms.f-static.net/uploads/4475852/normal_601da22a86c9c.pdf
    • http://megatorg.ru/28371527021gubpf.pdf
    • http://dronextactical.xyz/church_of_christ_sermon_outlines_powerpointanc0i.pdf
    • http://1ux.site/the_essentials_of_technical_communication_4th_ed_ebookb4zky.pdf
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5fd6d5b24c64a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kodugexibitomo.rf.gd/education._com_valentine_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/fe01b569-1b80-450b-a435-dcd064e31e27/todays_national_news_headlines_in_hindi_for_school_assembly.pdf
    • http://fubaragete.rf.gd/english_alphabet_worksheet.pdf
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_b016f02227fe455daea9970e04e4913a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/36f00da2-facf-47b1-8e4e-8f2b66235b01/how_to_generate_a_random_number_in_tableau.pdf
    • https://uploads.strikinglycdn.com/files/d173ceed-c273-4ad1-a88d-17c50f8b4888/msi_h81m-p33_setup.pdf
    • https://uploads.strikinglycdn.com/files/92746fab-f329-4e70-b8bb-d7ec8162000e/camping_near_albert_pike_recreation_area.pdf
    • http://wekumut.epizy.com/united_health_care_prior_authorization_medication_form.pdf
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_8e284755741b4ee586ffb3e4d514489e.pdf?index=true
    • 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_off0000cba1.bin
1e4e3ae0c82219cfddea06d9037de9a6c3c254fc9120c1e8481d5c5c1d0fa2fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA1 5240 bytes
font_01_sfnt_off0000dd65.bin
3340721b7339f7e324bc4d1106e7edd4594b937adbb39ab203d8bbbd6639ee21
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD65 10216 bytes