Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b4573202436489…

MALICIOUS

PDF

95.0 KB Created: 2021-04-15 07:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 95483b64ca5afdbbedc37396fc5547fd SHA-1: cf8e3f3e34bfb0eb85027703dfb37a5c5db83983 SHA-256: c6b4573202436489da6b75669e34d1fc812f1b54ea55ad97812737e11fdd8717
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to potentially malicious content, such as the URL 'https://botokaw.ru/strik?utm_term=pioneer+vsx+521+arc'. The document body, though heavily obfuscated, suggests a lure related to a 'Pioneer vsx 521 arc' and a game download, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://botokaw.ru/strik?utm_term=pioneer+vsx+521+arc PDF link annotation
    • https://cdn.sqhk.co/sajatanugeg/gc6ghaW/moto_racing_rider_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/gipVkkF/codecademy_javascript_answers_2018.pdfIn PDF document text
    • http://chunyoo.com/42305278082ww6o4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_600c6479b068c.pdfIn PDF document text
    • http://tokemiji.22web.org/apprendre_francais_a2.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/jjhhaie/2019_semi_monthly_payroll_calendar.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/f0geZ6u/random_deck_generator_clash_royale_arena_10.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/LaKheia/86535126336.pdfIn PDF document text
    • http://operationhomeplate.com/14507198752mvn46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_605aab3770bd0.pdfIn PDF document text
    • http://prodson.space/lubokodewu13w4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lonozixugixapap.epizy.com/cps_reporting_in_washington_state.pdfIn PDF document text
    • http://getapumofibejop.epizy.com/conscious_sedation_nursing_guidelines.pdfIn PDF document text
    • http://gabinosemepof.epizy.com/20707276648.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/surifuri.pdfIn PDF document text
    • http://pidifuwamofuw.epizy.com/nazebadanixabida.pdfIn PDF document text
    • http://wadagafek.rf.gd/credit_default_swap_explained.pdfIn PDF document text
    • http://fuzezufomazo.rf.gd/78887369378.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/msi_b250m_bazooka_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/80685055194.pdfIn PDF document text
    • http://dowirimidezifa.rf.gd/mujapinawewulagugamepir.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/44480147393.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/luludoxufewiboruramela.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D6 4908 bytes
SHA-256: 2d23cb955bc4178be65be66b2a528eaeb053b823c96fdb685d0717c59d6c9e1f
font_01_sfnt_off0001378d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378D 11760 bytes
SHA-256: 31b0aa9a396abda389391dc97844a715cf74365e6917747309ade016ee619780
font_02_sfnt_off00015f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F0B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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