Malicious PDF — malware analysis report

Static analysis result for SHA-256 30811572556817c6…

MALICIOUS

PDF

66.7 KB Created: 2021-02-27 10:29:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 330d5981c99c5d508b7e392a81597950 SHA-1: b61f30b59e3c96e475d019861805f623c2837b1e SHA-256: 30811572556817c613060a9eae0b462087df50c279924f19d75a9e1195352b5a
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs pointing to external, potentially malicious domains, suggesting a phishing or malware distribution scheme. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vilenefex.ru/strik?utm_term=kawasaki+bayou+250+start+button PDF link annotation
    • https://cdn.sqhk.co/bitizulokiva/jgibhfk/digestion_begins_in_the_stomach.pdfIn PDF document text
    • http://seomagnat1.online/what_do_colleges_want_to_see_in_a_personal_statementigwbg.pdfIn PDF document text
    • http://stakingyfi.com/45849738011d3gjb.pdfIn PDF document text
    • http://gitilapen.66ghz.com/37474990628.pdfIn PDF document text
    • http://rent-nout.site/latest_comedy_movies_2019uf9m0.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/XngieF0/old_homesteads_for_sale_in_tennessee.pdfIn PDF document text
    • http://jiludedo.iblogger.org/movie_ticket_booking_website_template.pdfIn PDF document text
    • http://insuranceautousa.com/swift_action_sheet_custom_viewqe73b.pdfIn PDF document text
    • http://logvoz.ru/roku_2_remote_not_working_no_pairing_buttonezk2f.pdfIn PDF document text
    • http://jujudinopuloxam.22web.org/android_games_apk_offline.pdfIn PDF document text
    • http://nesobaka9.xyz/62096716599mj6mt.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/Xn4OVGF/74349080521.pdfIn PDF document text
    • http://ens-pictures.ru/apidra_dosage_form0e21n.pdfIn PDF document text
    • https://cdn.sqhk.co/jekenilegefe/8dhbt8w/eggy_numbers_to_100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sesiperuvi.rf.gd/1_tbsp_butter_nutrition_information.pdfIn PDF document text
    • http://bazogito.epizy.com/grounded_theory_methodology.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/wrox_professional_assembly_language.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/39195586294.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/46987535790.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 5412 bytes
SHA-256: 2efc07f427d1186c370b57c638be8c779c1b3329ece8b52be86c69f68daf0778

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