Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3e2a045aaa266e…

MALICIOUS

PDF

84.6 KB Created: 2021-03-19 09:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e04997ec4ca8159ce7621efc7e34733 SHA-1: b8dc02572a51295fd4859dd4a8f920b0111fa02f SHA-256: 1c3e2a045aaa266e43e69036638762525961221112985ef0833564b56d61c676
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains text related to the URL's keyword, suggesting a lure to trick users into downloading malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/award?keyword=geographic+information+systems+science+3rd+edition+pdf
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fe624e685caf.pdf
    • https://cdn-cms.f-static.net/uploads/4462351/normal_601f21dd8eb5d.pdf
    • https://cdn-cms.f-static.net/uploads/4453741/normal_601f3f61c469b.pdf
    • http://pinerapidsrr.com/93057928729scfyp.pdf
    • http://peskomment.ru/how_to_change_battery_toyota_corolla_2005ilv5i.pdf
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5fe39f93b67c2.pdf
    • http://sentytld.online/rulomeretejalevoraw6z114.pdf
    • http://ogranicbio.fun/xenowuxazozemiwotavevl8gj0.pdf
    • https://static.s123-cdn-static.com/uploads/4378171/normal_5fe29be45f18d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/midaguvimabof/css_grid_layout_responsive_template.pdf
    • https://s3.amazonaws.com/gopuze/form_button_outside_form.pdf
    • https://s3.amazonaws.com/taguxif/conditional_formatting_not_working_in_access_report.pdf
    • https://uploads.strikinglycdn.com/files/83fe9f81-acf0-4e04-8036-7c366af7976e/29972368435.pdf
    • https://s3.amazonaws.com/pevuwarobuvowa/difogevafonomijijegit.pdf
    • https://s3.amazonaws.com/jawusawar/xevazirivaxodikip.pdf
    • https://s3.amazonaws.com/gezetega/aspiration_pna_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/bee0ef48-0e0d-4078-a2bc-095eda860187/76223288281.pdf
    • https://s3.amazonaws.com/bizamesuwepe/guided_meditation_for_back_pain.pdf
    • https://uploads.strikinglycdn.com/files/288ed2c3-bf47-4132-8bf5-55fb48676008/70914737595.pdf
    • https://s3.amazonaws.com/dewutexorob/confederate_army_uniforms_at_gettysburg.pdf
    • https://uploads.strikinglycdn.com/files/95f21796-be73-4ad1-a57e-b4bdaeb74f31/python_for_beginners_free.pdf
    • https://s3.amazonaws.com/jiwotarotavuz/visumopefofojo.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_off00010cfb.bin
9436cd97440e320064f1a5059abc28fce0aeaee5a4eb04bccee91fa68639b11e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFB 5836 bytes
font_01_sfnt_off000120be.bin
5486a4725b8ae27dc5867813e00742fb924c88aaaf1bb1aa0a6279d788b189a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120BE 10492 bytes

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