Malicious PDF — malware analysis report

Static analysis result for SHA-256 df853a0ff0973995…

MALICIOUS

PDF

73.8 KB Created: 2021-03-24 08:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee32b1dab4bb398eea6ccaedec26c01e SHA-1: 2be896c40a00ade331192ae32b0bcf3ad899131f SHA-256: df853a0ff0973995cd67590f99041f5f7b618d853999b612d810344dd905c6a3
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, 'https://ponafet.ru/strik?utm_term=what+is+a+normal+a1c+level+for+a+type+1+diabetes', is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain text related to diabetes, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ponafet.ru/strik?utm_term=what+is+a+normal+a1c+level+for+a+type+1+diabetes
    • https://cdn.sqhk.co/nujekezitifi/fBigibE/vondra_veterinary_clinic_lincoln_nebraska.pdf
    • https://cdn-cms.f-static.net/uploads/4446647/normal_6055ab5853036.pdf
    • http://weinmvc.net/scratch_pacman_tutoriale8eag.pdf
    • https://cdn-cms.f-static.net/uploads/4383798/normal_602d875a21573.pdf
    • https://cdn.sqhk.co/vitikitema/cOhjMji/tubipozeliwe.pdf
    • https://cdn.sqhk.co/jumifokujuje/Lhjm4id/lekapegisebibinexewora.pdf
    • http://groby-ritual.online/flight_pilot_simulator_3d_mod_unlimited_moneylszoc.pdf
    • http://recepty-dd.info/restaurant_employee_evaluation_form_templatel9zcy.pdf
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdf
    • http://fruitslope.online/the_boy_who_climbed_in_my_bedroom_window_vkrqzdr.pdf
    • http://reawolt.online/el_mas_grandioso_amornksye.pdf
    • http://risozeretelefa.22web.org/george_foreman_grill_walmart_exclusive.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://puwekaxaxowiza.epizy.com/belt_bucket_elevator_design.pdf
    • 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_off0000dc77.bin
c20098a27208bcf1b6baf5a01e72bd74e2f7048bf42cf38c42c9827d22937e85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC77 5764 bytes
font_01_sfnt_off0000f002.bin
01ecd535a91011a1b375c970ec4d7f8e2ecb3603e8e4c2b92044016f6306904a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 12008 bytes

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