Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f25db08a57b8250…

MALICIOUS

PDF

87.1 KB Created: 2021-03-20 13:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4348e9d519c25ea043e5d82501432212 SHA-1: cfddbd4bf2a1ab33d3a7487ce20c0e3f35ec8836 SHA-256: 0f25db08a57b8250da477f311a5d252162aa0bc0e736323e4aeff4ed1df00bff
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and appears to be junk data, suggesting the primary function is to host and deliver malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8962

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=cobra+29+lx+manual+en+espa%25C3%25B1ol In PDF document text
    • http://xurixekan.22web.org/schindler_s_list_theme_violin_sheet_music.pdfIn PDF document text
    • http://gatorama.space/plural_nouns_worksheet_grade_3xlc9c.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/Daegi9I/biblical_coloring_books_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/hLgeyia/vasufelaxuzizalijimoxeni.pdfIn PDF document text
    • http://dvestideyli.xyz/mass_flow_rate_formula_thermodynamicsswpph.pdfIn PDF document text
    • http://brosbass.com/what_is_a_trustee_of_a_universityi8o9c.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/dazanulinavizizovuhr35s.pdfIn PDF document text
    • http://fortysgjdk.fun/tatexijubizoguj7476.pdfIn PDF document text
    • https://vusokozederik.weebly.com/uploads/1/3/4/9/134901716/a8943b57f6d8.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/4jgibQV/9952558218.pdfIn PDF document text
    • https://tigixunejalimiw.weebly.com/uploads/1/3/5/3/135315438/632410.pdfIn PDF document text
    • http://datab.vip/lead_me_to_the_cross_guitar_chords_easynme28.pdfIn PDF document text
    • http://all-system7.work/jodorowsky_s_dune_scriptviwch.pdfIn PDF document text
    • http://ketotreno.buzz/where_is_the_hill_cia_training_facilityrhhnu.pdfIn PDF document text
    • http://soxupagab.epizy.com/zebavidiluni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e16d55d-4a12-4b04-b4cd-e0b1e032ff9a/34684973311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64e801e-bb26-4c88-afea-2ff96cd3a331/machine_learning_vs_artificial_intelligence_vs_deep_learning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608f7f84-05b4-4145-b464-8aaa58644dbb/26161977904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8b9771-0fc9-42fe-9288-8ab7b3d015c1/23706210185.pdfIn PDF document text