Malicious PDF — malware analysis report

Static analysis result for SHA-256 0237e9fd7cfbfd3b…

MALICIOUS

PDF

77.7 KB Created: 2021-03-11 00:08:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 509dee3ec7b0d3fafe096f09e3212b0c SHA-1: 93ddc107329613c633b752c4bae7f731dd82e94d SHA-256: 0237e9fd7cfbfd3b157c8686a1a858cf154b71eecdabd77d3383e0d8f366cb43
126 Risk Score

Malware Insights

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

This PDF document contains multiple external URIs, including one hosted on a disposable domain, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation. No scripts were extracted, but the presence of numerous URLs and the high confidence detection scores point towards a phishing campaign.

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://soxebez.ru/aws?utm_term=how+to+use+wolf+toaster+oven PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463538/normal_602e3267a8905.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/5372310853.pdfIn PDF document text
    • http://xinuvaro.sportsontheweb.net/49157631207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_600a0a138e00a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_5ff713819bb64.pdfIn PDF document text
    • http://doxisodezezaku.iblogger.org/jasiduzubozukumunajiku.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/19738359074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468259/normal_6002b8c01beb4.pdfIn PDF document text
    • http://kevarusakoko.mypressonline.com/the_jesus_prayer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_565496ef1fd3451a83b0f93406205d14.pdf?index=trueIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_f8145787102f45ab9271cabeea58e8a7.pdf?index=trueIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_41ba7f599436424b842d198a508ec221.pdf?index=trueIn PDF document text
    • http://sumafalonedap.rf.gd/xodijujukijerakokusoja.pdfIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_29d9c4400e8644539178d65ebc6f7d87.pdf?index=trueIn PDF document text
    • http://resilasijajatil.myartsonline.com/barbara_minto_pyramid_principle.pdfIn PDF document text
    • http://gezibetaw.epizy.com/alien_creeps_guide.pdfIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_0ea679c5122b4776849ed502ed2dc97d.pdf?index=trueIn PDF document text
    • http://sajulugebimisu.myartsonline.com/what_does_e04_mean_on_relion_prime.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_off0000f456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF456 4872 bytes
SHA-256: 83c8a61aaf7b2a64bcfdf1fd7b46e86d78be6fbd641c1c54c2a2281451808fc3
font_01_sfnt_off0001050f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050F 11012 bytes
SHA-256: 98cd463334df31b8c5d189c8da29f0e00c4106f8d89f2783f7a273b2b0970a3d

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