Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4589d8f4d6a905…

MALICIOUS

PDF

78.9 KB Created: 2021-02-19 18:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8a790add26ee8cc0f6a634cd9a6c7034 SHA-1: 0e539c09220628ebd50f97dbccf199093d99aec9 SHA-256: cb4589d8f4d6a905bf16fdc36fc8a09a265a775636a95a840b72e95b66122cf9
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to suspicious domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the detected heuristics point towards a phishing attack that likely aims to redirect the user to a malicious site for further exploitation.

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://bologen.ru/wix?keyword=saucony+women%2527s+guide+9+size+8.5 PDF link annotation
    • http://gejekixevase.22web.org/volofevodito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379960/normal_5ffc72b5afc67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495974/normal_5fe419398b142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5fd2040286fa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_6009a1011f0ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387582/normal_5fe529fd439aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_600c3c45b1960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450421/normal_600cc5fb5b7c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495973/normal_5ff8008fe5cd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460243/normal_6005fb5de25a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500882/normal_5fdfaf4735e8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://numifugok.rf.gd/assoluto_racing_real_grip_mod_apk.pdfIn PDF document text
    • http://faxipobusevive.rf.gd/88688013239.pdfIn PDF document text
    • http://mamuzov.rf.gd/angle_of_depression_word_problems_with_answers.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_off0000e814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE814 5820 bytes
SHA-256: 564598f5d8e1f655117d967cfe0eeb7c27104f33ad5549a15f1e120e7778899f
font_01_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 10720 bytes
SHA-256: 4d8216c29eb1533c8fcd72fca334245045729ace854c3283bef1290f433953da
font_02_sfnt_off0001207f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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