Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54804f7c46dc9e2…

MALICIOUS

PDF

76.6 KB Created: 2021-03-08 21:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4b4584f1fff13194250f48d3912a76e6 SHA-1: 41174e0a6b52b7f080d45624289cdbd011d06ec6 SHA-256: f54804f7c46dc9e2517a1d2c0c64b19c842cbbb7e590d4ef0e226bd7c1adf6ef
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary focus on directing the user to 'fokemale.ru' under the guise of a search result. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/award?keyword=astm+a53+07+pdf PDF link annotation
    • https://cdn.sqhk.co/livefivepa/jiiiHAP/58251615060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476566/normal_5fe391707173b.pdfIn PDF document text
    • https://cdn.sqhk.co/zozimevoket/WidlTib/hitman_s_bodyguard_watch_brand.pdfIn PDF document text
    • http://vuxijagodoku.22web.org/xidulugogar.pdfIn PDF document text
    • http://in-arenas.com/download_grammar_bookfeuwp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369516/normal_5fefa5e4ae452.pdfIn PDF document text
    • https://cdn.sqhk.co/tugitajusow/8jc09hi/vogewunoterefubedebipawuv.pdfIn PDF document text
    • http://karaulovlife.site/zebra_zp_505_driver_windows_10edhe0.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/egigcED/cisco_asa_show_security_context.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485809/normal_6025fb9f6ed04.pdfIn PDF document text
    • http://lesantyqas.online/scotch_yoke_mechanism17idf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_5fd7750b15f11.pdfIn PDF document text
    • https://cdn.sqhk.co/vavefamixivi/Vjhfdxd/cims_cancer_hospital_ahmedabad_contact_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb03cab-0ff3-4814-8a82-b9dfc4ad9afe/resumen_caballero_de_la_armadura_oxidada_enseanza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9122f4c-ae46-45b0-92a4-c6aabfc372c8/xefopiwewoku.pdfIn PDF document text
    • http://gavadupuwegak.epizy.com/40164147305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8da5e8-61b2-4472-a669-8043af0f495d/valence_electron_worksheet_lewis_structures_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51dd5f2-94d3-41a0-9055-fe959ac585fd/how_to_outline_a_marketing_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea01e24-da0c-4594-8a6d-a95fc7e18ab0/irregular_verbs_in_the_preterite_song.pdfIn PDF document text
    • http://javasuk.epizy.com/vonagenarigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e8cdde-8b4d-41d2-a3f7-8cc0553661f0/xuvodupevejesupemarugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b6d92e1-eba3-4934-ae23-761645b16243/what_is_management_by_objectives_in_malayalam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acc29d8-ff42-4237-bc0d-47a1b19b2a88/kepugotudetot.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_off0000eb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1C 5560 bytes
SHA-256: 8912aafa2740438306df56fc40a8e552a8c39148c843675ced535acd81b7fb21
font_01_sfnt_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 11472 bytes
SHA-256: 0ff9ef98428a14fedb0cf37958995bc5b25c5817de2dbaf06eb1a8ccc09a168e