Malicious PDF — malware analysis report

Static analysis result for SHA-256 29697c395ff0b259…

MALICIOUS

PDF

87.5 KB Created: 2021-05-03 15:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 40ccb4653e1a0d79b8a8865300a81015 SHA-1: dad9bc961aa21cf8adad8748af29aaf05f1a12d4 SHA-256: 29697c395ff0b259184a5006e683b961969f7117b6557daba41d5d2589679144
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to a suspicious domain, identified as a potential link farm and flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of hosting multiple links on disposable domains, often used for phishing or distributing malware. The presence of an external URI and the ML/ClamAV detections strongly suggest malicious intent, likely to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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/strik?utm_term=what+is+the+main+goal+of+the+juvenile+justice+system PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406223/normal_606347f39709f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fc9505734bd8.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/como_sacar_el_titulo_de_un_carro.pdfIn PDF document text
    • http://roboludawu.mywebcommunity.org/5437988343.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/jodabiladezot/hybrid_intrusion_detection_system_project_report.pdfIn PDF document text
    • http://sadoboxijowem.myartsonline.com/ptolemy_geography_english_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cb204c-1982-423f-b35f-ccb1f8cd28d3/crochet_blanket_patterns_for_thick_yarn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946b7668-883e-4dcd-a3dd-412de374d794/night_owl_security_camera_extension_cable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28312715-7012-474e-9f8f-33541002a963/is_augmentin_875_good_for_tooth_infection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f34e13e-2461-4b87-803e-994672255f99/heat_transfer_holman_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/google_sheets_column_width_too_small.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57dc13b-392a-456d-bcf7-44329573c0a2/45458535864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92fba773-9cfc-4c84-a808-1bb7af7c4ee1/skin_so_soft_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/how_to_program_chamberlain_clicker_to_overhead_door.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/24143194200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15278f16-c2ad-4177-bfe3-1b866fd9515c/75639084145.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/90053685924.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/66552487246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11a2be8-c973-4e4c-971a-7a6f23befaf9/mta_subway_map_nyc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10246 5448 bytes
SHA-256: f45b19d9e13dbca1f88be017a2a4e922df3db64b59bd451bc12e79fe88191559
font_01_sfnt_off000114cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CF 11072 bytes
SHA-256: 271bdc323ba0aecf138ed116876160ad461d0b604fff7b04eb66262309af6184
font_02_sfnt_off00013ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD3 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449