Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf92826f8c96197…

MALICIOUS

PDF

78.6 KB Created: 2021-02-10 19:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 538896b6290894e2461f837d3c933055 SHA-1: b4e2ead5d8b26d29ec7dbfc1932d290d2b9f6c58 SHA-256: cdf92826f8c96197a9aefe4cedbd7ace1a43489de6d4a25307309c66508d6dcb
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the external URI is a strong indicator of malicious intent.

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://jottigo.ru/wb?keyword=formal%20dress%20code%20wedding%20singapore PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413473/normal_5feb58feee4f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412767/normal_5ff13c9088270.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5fc8131cde73d.pdfIn PDF document text
    • http://vidavubaxo.22web.org/lexepetipupugoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_60171a48f13ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fc88369288ed.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/jadudusujuje/9177056520.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/el_poder_curativo_de_la_cabala.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/22168160749.pdfIn PDF document text
    • http://fasilew.epizy.com/zibawosozexa.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/mejunusibarij.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/bouwbesluit_in_de_praktijk_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/cyrano_de_bergerac_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/powuzakodegogovufi.pdfIn PDF document text
    • http://magelul.epizy.com/26741987478.pdfIn PDF document text
    • http://begukisar.epizy.com/beringer_white_zinfandel_tech_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 3468 bytes
SHA-256: a7bde18dc1eec4f9cff5c5392d4f75a138f43d39189061b22c8370a37bf44db9
font_01_sfnt_off0000f620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF620 5440 bytes
SHA-256: 44f458cb192424bda3fbe5d5eb08813441329b29101cb073fa56b5bcf77b412b
font_02_sfnt_off000108a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A3 10744 bytes
SHA-256: 1d33e8eff1d4acdfa29c9456e647b2985a8376a59e4709a639ba49b0f6b31446

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