Malicious PDF — malware analysis report

Static analysis result for SHA-256 82def2c4f2c17ea1…

MALICIOUS

PDF

78.1 KB Created: 2021-02-21 09:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 514e568a6e461838abc8ee123f872e8f SHA-1: 63c8f3678cd9d2d9b27b61aeb84fcc2def20d2e7 SHA-256: 82def2c4f2c17ea1a76a3ef6343f931cb72bb2d152af0be9e1bf38ca8f08c6dd
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of an external URI and embedded URLs suggests the document is designed to redirect the user to a malicious site, likely to download further malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/123?utm_term=brother+hl-2170w+printer+manual PDF link annotation
    • http://gudazugaxogipo.22web.org/opera_browser_for_windows_7_filehippo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5ff4a6de58f96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fe83b863b35e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369316/normal_5ff9c5ce88f01.pdfIn PDF document text
    • https://nupigefaxobabu.weebly.com/uploads/1/3/1/0/131070289/wefixonezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447631/normal_5fd10bf0764bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_60262367cafa3.pdfIn PDF document text
    • https://binazinir.weebly.com/uploads/1/3/4/1/134108718/8324632.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wigebinijeg.epizy.com/ap_physics_c_e_m_review_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/advanced_grammar_in_use_extra_activities_apk.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_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 5460 bytes
SHA-256: 033085dd47bc14ed587fb216ffc2dd195117e8f25ca7719cffa0d3a07f086466
font_01_sfnt_off0001052c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 11308 bytes
SHA-256: 7437117102d191d22ec90b5c40d095edcd4fded287e34b8b57d9e8174aed8b1a

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