Malicious PDF — malware analysis report

Static analysis result for SHA-256 039c2e4b0846714e…

MALICIOUS

PDF

69.8 KB Created: 2020-12-19 04:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 728bed64555f473274dfb323c5d78846 SHA-1: 1f348170807d83c49e6040ca5d3e6708321e3e42 SHA-256: 039c2e4b0846714e816d7b1327beb554412b3a78ba9fbf6b68ee65675b132912
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains a large number of external links, many of which are to PDF files, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains metadata related to 'Tutankhamun death mask ks2' and the authoring application, likely serving as a lure to direct users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?utm_term=tutankhamun+death+mask+ks2 PDF link annotation
    • https://tujezaxe.weebly.com/uploads/1/3/4/6/134616668/rixupej_wefozureb.pdfIn PDF document text
    • https://fisofomopix.weebly.com/uploads/1/3/4/6/134603918/ruzamox.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/tusefalurij.pdfIn PDF document text
    • https://mobonojijokatu.weebly.com/uploads/1/3/4/3/134320628/4af60334.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/kurarenoxunu_waxukaz_visukosagugo_riviwil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc14d850a2757459be59ac6/t/5fc4a0dffa04221c71b2cbd6/1606721759974/mapawoxavuxexepakasod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c137fc06-6832-4284-b66a-400c00503e26/11642152171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26b53e9-e95b-41e2-ad68-3995682bbccb/72647964976.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f22ee5c7695ca99bddc9/t/5fc1cdb84e98326c0252f82e/1606536632964/pushing_the_limits_brain_power_worksheet_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de9c5bcb0228a2825217/t/5fc32674eaf37e3b640378f6/1606624889958/tewivinetotigux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a22611-464c-4f18-9db5-f08e70d2623a/pogamixurusabirimugetudud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b943762b-ee0c-4c2f-b216-969e9207464e/23389809633.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcbb9339856919c2930471/t/5fdd0ee2683807367bd0340a/1608322787612/bowmasters_mod_apk_for_ios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe117dfa04221c71e85385/1606291837449/watch_joker_full_movie_2019.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_off0000d1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AB 5080 bytes
SHA-256: b82280d4b1d40ac8821ad4e1dfe9515b7fe6f9be72a066d360cb85a471e266c2
font_01_sfnt_off0000e2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CE 11740 bytes
SHA-256: ae91739772967c56f1e867b59a55cc320c427c6c654e5025f6cf534f8b56669c

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