Malicious PDF — malware analysis report

Static analysis result for SHA-256 da01cfc129e5a077…

MALICIOUS

PDF

73.4 KB Created: 2021-01-21 21:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2620dcc11e3bc9ed539e2798087d6181 SHA-1: 11244d673edb7a1e2d527a19238d85294632e163 SHA-256: da01cfc129e5a077de0cb4fe32fa70503946699e607181a62153ad8b5f647708
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Twitch Prime free trial', suggesting a phishing lure. An external URI pointing to 'leonvi.ru' was extracted, which is likely the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/123?utm_term=how+does+twitch+prime+free+trial+work PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393515/normal_5fe4fac72525f.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/thjMig8/motije.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/g4hcyPJ/my_club_app_pakistan.pdfIn PDF document text
    • https://site-1168215.mozfiles.com/files/1168215/semevukalopoximaxomapum.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/Va6ijhf/64283159531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447906/normal_5fcf33bd19e9b.pdfIn PDF document text
    • https://cdn.sqhk.co/nukuzulu/RsjdJjj/rulirawus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_5fe9efeed9594.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/bpdijTi/52274644700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/aspergillosis_in_animals.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/52636151358.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/akcent_thats_my_name_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/81864505046.pdfIn PDF document text
    • http://kasaxamaburabuz.epizy.com/32170189568.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_off0000df05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF05 5512 bytes
SHA-256: 2323cd9e0c0e559dee01d0560ec848441cfa475f532e4abc65f083c65829b687
font_01_sfnt_off0000f1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 10888 bytes
SHA-256: c15789164c74ae1be67cf76fd1d78b8b1cc75371de11626128002c5ae4deffb0

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