Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b99bf3d0b9a87d4…

MALICIOUS

PDF

69.3 KB Created: 2021-02-16 00:16:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c3c08fba50f01bbe14a39e0ca9136135 SHA-1: 188ab47eef83263aad33d36350d4d3d591686b16 SHA-256: 9b99bf3d0b9a87d44a6c927e552a6772c59dfae770f3a54a99db9891c204817c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, masquerading as 'cat's cradle instructions'. This indicates a phishing attempt to redirect users to a malicious site. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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
  • 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://seumenha.ru/wix?keyword=cat%2527s+cradle+instructions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376852/normal_601a55e413056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fd89ddc3f508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447658/normal_5fd7657442072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_6010966546902.pdfIn PDF document text
    • http://befenero.22web.org/64494826866.pdfIn PDF document text
    • http://esagafow.fun/wikokoboro1ck5w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5fd8e8046b7e5.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/juvosi/19524240954.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/jevil_theme_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/long_division_worksheets_for_6th_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/antifreeze_50_50_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/vcf_file_viewer.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/osmosis_lab_report_rubber_egg.pdfIn PDF document text
    • http://fuginifetulad.epizy.com/56919150965.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/98077247664.pdfIn PDF document text
    • http://kugesiv.epizy.com/xumevi.pdfIn PDF document text
    • http://zorogeloma.epizy.com/85134107796.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_off0000d4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F3 5088 bytes
SHA-256: 8a0677840b33eb69d433a857ad8389a0b95acf0a7cadc9c317d7d3c294bc7100
font_01_sfnt_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 9948 bytes
SHA-256: 04519973d2bc96cafa0cfb1512cad8533f5c487484df8dce56b4e8c8306e7722

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