Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6cb3b42f6c7659…

MALICIOUS

PDF

95.2 KB Created: 2021-01-01 23:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 70225c7286205f1afba076507e3b6ef3 SHA-1: df083d2dbc481ae68e2ffc2f3e2f53db0db6516d SHA-256: cc6cb3b42f6c765903883f6ac1fe838996de171cb3bb464991ab3123623f31d3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting it is part of a link farm or phishing campaign. The embedded URLs and the document's structure strongly suggest it is designed to redirect users to harmful websites, likely for credential harvesting or malware distribution.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/123?utm_term=new+york+school+graphic+design+style PDF link annotation
    • https://cdn.sqhk.co/vivutazawi/cb3ujfN/35027203415.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/fjg624J/99851481221.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/ghlgcji/70945529051.pdfIn PDF document text
    • https://wofinomedek.weebly.com/uploads/1/3/4/1/134108675/lujagofutexaxap.pdfIn PDF document text
    • https://tukumexof.weebly.com/uploads/1/3/4/7/134721389/foporilob.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/sudewatezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f874d01084ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3412d178-e8d6-4447-8c66-16b7be8929df/psychology_perspectives_and_connecti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b5090c2-56bc-4040-a59f-dc2954ecec43/4498596269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c0af4e-b9c2-4652-8790-b07d9785776e/52530178397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1cb08f-15c1-4f92-a470-eb5accbc2afa/icivics_worksheet_answers_one_big_party.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30de935-7a3c-4cea-a11a-449d84888df9/jizosuxaxurusukedaninikep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ddd421a-6fa1-4c26-84f7-0422b07331f7/38177476669.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_off0001364d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364D 5564 bytes
SHA-256: 9cf0ae7e80034c41c212866d1e2276e8d1b84eeb1b8168e130c1a79f33ed52c2
font_01_sfnt_off00014963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14963 11344 bytes
SHA-256: 3258f5e02818795c76163ae67985ec55a19c3284e9d9629f2d79dde558870940

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