Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2abf256f3c16ce…

MALICIOUS

PDF

75.0 KB Created: 2021-02-27 05:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e5532313055134272c42da5b1cecef46 SHA-1: d4799088f7541fea23c1a6057e0ee6f9a8da98f4 SHA-256: fa2abf256f3c16cef531c9348011ef642574fba6796f0066800f1e761304e7ff
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host phishing content or a further payload. The document body, though heavily obfuscated, contains text related to 'school vacation', suggesting a social engineering lure.

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://jumiwimov.ru/wix?keyword=nh+school+vacation+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460060/normal_5fe065d983e04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418381/normal_5ff6c26b1d9c7.pdfIn PDF document text
    • http://cancandance.org/20399395243bvmjd.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/best_indian_romantic_novels_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488842/normal_600149eacbaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_60184fb422118.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/guitar_songbook_for_pc_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420224/normal_6003e55c5d9ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464739/normal_5ffd067e243ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_6035781b0e9a4.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/legapatatezisa/rukewuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/93314955586.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/96432296205.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/jorawage.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/how_heavy_is_a_bag_of_mulch.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_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 5096 bytes
SHA-256: 458e0d873a0a559625a2a94ea4fc341f133aa82860d2fd681a5c0ee2fb5c6eaa
font_01_sfnt_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 10700 bytes
SHA-256: d08a3b0c4f8a4fb7a035d19fd71db2d14130bc5d6fbd7fee6a71b9bd3f74eb0d

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