Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bddfbb4f6d1d43d…

MALICIOUS

PDF

202.6 KB Created: 2021-04-08 08:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ab21852a8dda3ce580204d14b9bb360 SHA-1: 5303a63911ddd9d2bf075f5fb858310dc0124a2f SHA-256: 5bddfbb4f6d1d43d68e04c77cf466c01e5d34517b03dce57fee9029fdcf6f876
104 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and heuristic analysis indicates it's a phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kuzutuzo.ru/wix?keyword=technical+chemistry+gas+laws+magic+square+answers
    • http://xefopuro.mypressonline.com/will_tesla_increase_range.pdf
    • https://cdn-cms.f-static.net/uploads/4499635/normal_603b3024de23c.pdf
    • https://cdn-cms.f-static.net/uploads/4377933/normal_606220c9c4099.pdf
    • http://risonubokedoxav.scienceontheweb.net/biodata_format_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4422908/normal_6016d0a7eabd9.pdf
    • https://cdn-cms.f-static.net/uploads/4459796/normal_604583d7b81fd.pdf
    • http://lanizimugigil.getenjoyment.net/85545752533.pdf
    • https://cdn-cms.f-static.net/uploads/4377408/normal_606296c625a65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mesixadelomomo/pajan.pdf
    • https://uploads.strikinglycdn.com/files/89deb86b-fd21-4e21-af8c-94a9d225492c/wing_chun_training_program.pdf
    • https://s3.amazonaws.com/teximikamukubo/6th_grade_math_integers_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/e081a37d-316c-42a7-917c-e1ce77029fb9/2002_jeep_grand_cherokee_laredo_owners_manual_free_download.pdf
    • https://uploads.strikinglycdn.com/files/881f3f2c-b9e6-477c-a3de-efc267515db5/blues_scale_guitar_exercise.pdf
    • http://fuluxewamotate.atwebpages.com/kegoburexexutuxabexepar.pdf
    • https://s3.amazonaws.com/naxozelozude/html_and_css_projects_ideas.pdf
    • https://uploads.strikinglycdn.com/files/d6933481-cb17-45a1-bf5d-7c6910f4d144/how_did_damon_salvatore_die.pdf
    • http://zeroxezubanalil.onlinewebshop.net/budaf.pdf
    • http://zerowegujij.onlinewebshop.net/fejivejumijowowiwowuru.pdf
    • https://uploads.strikinglycdn.com/files/7d6ef552-374a-430a-a8bb-578f8e8dd840/forged_in_battle_miniatures_review.pdf
    • https://s3.amazonaws.com/remavuj/sample_letter_of_intent_for_job_vacancy.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e313.bin
48ca3e6fbf1816d63584256423ea7febbdf0efb5d02d095e5a143a07a8f2333c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E313 5480 bytes
font_01_sfnt_off0002f5a0.bin
7a97f4672714dfa5c5d0e6d2beb91f7ac1b425e3a7e391fe949c100d5605751c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5A0 11392 bytes

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