Malicious PDF — malware analysis report

Static analysis result for SHA-256 8478cb3c57d5cfc7…

MALICIOUS

PDF

72.4 KB Created: 2021-02-09 11:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4b0e16dbdf1354df10afb177855a413e SHA-1: 89afe40845009bac1bbd102fa8bc498737d5f037 SHA-256: 8478cb3c57d5cfc7e129ee2e5c979ec12b9bfa1793fa3bd891876c19e7053afa
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URIs pointing to external resources, suggesting it's designed to redirect users to potentially malicious websites. The presence of these external links is consistent with phishing or credential harvesting attempts.

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://jacksth.ru/123?utm_term=ready+willing+and+able+movie PDF link annotation
    • http://xolululumaw.iblogger.org/1906000938.pdfIn PDF document text
    • http://varuzajuv.22web.org/33602723364.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447084/normal_600049b94efdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454694/normal_600b6747897b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390324/normal_60095364d4904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409255/normal_5fc57536c5227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_601f23782664b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_6010fbd3d3a42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421461/normal_601253fa55fab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fc574a842bae.pdfIn PDF document text
    • http://bewepovuzif.iblogger.org/33791089348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414851/normal_5fd1edac0648f.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/kumasala/85928406145.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/back_button_in_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/anari_movie_song_tinyjuke.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/nexonizotuk.pdfIn PDF document text
    • http://begosene.epizy.com/tejobowabiwewu.pdfIn PDF document text
    • http://resexam.epizy.com/crontab_format_in_linux_with_example.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_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 5272 bytes
SHA-256: 43ccc9a7e8934befc2961d7f46d2628200188b9fe76285ad29717e48d7123276
font_01_sfnt_off0000f1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B5 10148 bytes
SHA-256: 1d0132da7e3e34ee2f08be221f727830d39fa8e3a701117eff8afb5f2d461b70

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