Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc1b9090154be64…

MALICIOUS

PDF

76.6 KB Created: 2021-02-17 01:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e49e13ca0e8c60fe4128fd9b321a4682 SHA-1: 977768970753a92ce00b9b05165f20b97e54bd2a SHA-256: 5bc1b9090154be649f00ade81e4ac7043a26fa5ff3ba8b1d39a441bef6927169
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one, 'https://baarspo.ru/strik?utm_term=ryobi+2000+psi+pressure+washer+parts+list', identified as a potential lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=ryobi+2000+psi+pressure+washer+parts+list PDF link annotation
    • http://wewedaz.iblogger.org/jokagep.pdfIn PDF document text
    • http://lojasamericanasbr.com/think_big_donald_trumpfqxly.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/fhagggi/real_muscle_car_racing_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/napefabet/Jgijai6/week_by_week_baby_growth_chart_during_pregnancy.pdfIn PDF document text
    • http://xosopinogagon.iblogger.org/44011601438.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/kwgyggI/zabifopemalarufepiw.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/6iexjeR/wozilukusovofigegatefewi.pdfIn PDF document text
    • http://businessmentality.com/rokiniivmre.pdfIn PDF document text
    • http://kigowamukidiba.iblogger.org/hard_division_problems_with_answers.pdfIn PDF document text
    • http://you-bestshop.xyz/xezaledemefaxez5i8oq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zokitidekav.epizy.com/51204211189.pdfIn PDF document text
    • http://rurulaburasi.epizy.com/bhairavi_kannada_full_movie.pdfIn PDF document text
    • http://tutedenomazul.epizy.com/angina_de_ludwig_pediatria.pdfIn PDF document text
    • http://medemamonolusav.rf.gd/gagopurinigejawagotukipu.pdfIn PDF document text
    • http://xipovil.rf.gd/tufuwonefil.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_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 5520 bytes
SHA-256: 73014f7ad7f3a7f4a5eb81ff775de36269e3867186ebc771444fafa0b034356b
font_01_sfnt_off00010072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 10852 bytes
SHA-256: aa7529153536b9b243145740ae81762adee4ccf58343004c29c2a27f1013877c

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