Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72f7a27edf88840…

MALICIOUS

PDF

67.1 KB Created: 2021-04-28 21:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d77b25559ebce87bed41fd3cd7b9cd6b SHA-1: 24529c69ce9a41f41846c2bbd9ca57f18c9a04a9 SHA-256: c72f7a27edf88840341e074e2b664711ddb5f83fc516421a925d13c7e2728955
154 Risk Score

Malware Insights

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

This PDF file contains a malicious redirector link disguised as a printer advertisement. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL leads to a known malicious domain, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/strik?utm_term=hp+2620+printer+price In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426967/normal_5fe42058d4441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_604647f262f9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_606e06b00dc26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_603e0bd31ba6e.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/523e02a9-880d-4a69-bcca-2178f6495d05/defodubujuze.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/how_to_provide_cognitive_behavioral_therapy.pdfIn PDF document text
    • http://gozadowosib.rf.gd/59486239194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d19f11f-6c78-41c0-8ed4-34ae6eefe19e/26415417812.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/19897996788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc931699-d654-4e8d-8bfc-303597e9167d/how_to_connect_element_tv_to_directv_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60fd321e-6d64-4a80-a74b-584e5316b91b/is_trs_a_qualified_retirement_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/tamilrockers_new_tamil_movies_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70392ce0-085c-449d-aac2-50bb31376052/stannah_600_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/47683979860.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/gedivuresogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b3d49a-83b0-487e-8510-8fbf0314aefb/power_system_analysis_john_grainger_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/73058799409.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_off0000c9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DA 4896 bytes
SHA-256: 96d21620c30b33b5efdb07c904b0efa9270d044552db9c23eecaae5b0dcef65e
font_01_sfnt_off0000da9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9D 10548 bytes
SHA-256: f410533adb5e317785a8f358addfa7e07e6f4c636b7478a1f2b13123b6a6c651

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