Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21460452c990f8b…

MALICIOUS

PDF

75.4 KB Created: 2021-02-14 18:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 017e34f4a867ca201aaa2b7b08c08e32 SHA-1: 5e1bbeda1ea4a26d95fb00870aaa0fa36f744426 SHA-256: e21460452c990f8b8f719d730f4b01e741be0a849c2d0cbde78a7d9834926a84
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'druttle.ru', which is likely a malicious domain used to host a phishing page or download further payloads. The document body, though heavily obfuscated, suggests a lure related to 'Logos ethos pathos worksheet'. No scripts were extracted, but the presence of an external URI and the malware detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=logos+ethos+pathos+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489587/normal_6014c805570f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_60150b34cdf62.pdfIn PDF document text
    • http://wimazosuwoxugij.66ghz.com/contractor_award_letter_template.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/bNEQpid/wwe_network_live_stream_24_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5ff47f660f1bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_5feb8b316a67d.pdfIn PDF document text
    • https://cdn.sqhk.co/xifusajexom/dDjiqd4/85166464606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417809/normal_600a85ab8f4a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445531/normal_5fef8b329aec4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385421/normal_6001ee2ada27a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5fe979781a40d.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/ijiraCf/27937563105.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449410/normal_5ff6084e50e81.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/goviwigax/77275294127.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/inscribed_angles_and_arcs_worksheet_answer_key.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/whatsapp_android_4._4_4.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/guidelines_for_management_of_acute_appendicitis.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/laura_mercier_secret_camouflage_shade_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/coursera_probabilistic_graphical_models_quiz_answers.pdfIn PDF document text
    • http://lodonevubepivor.epizy.com/zexuxosekemonixifuvo.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_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 5148 bytes
SHA-256: 56e59b8371daaae93deadf8cb9dc15ec8b430b4c988459dbdca3038d0132693c
font_01_sfnt_off0000fd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD49 10172 bytes
SHA-256: edbb58f0d509218526bff6afe20c94e2b25f9cf41ac384fc55c3d80cfd3cbdd6

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