Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed1a6b2eff1da2f…

MALICIOUS

PDF

71.9 KB Created: 2021-03-05 18:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 263489fd198c6ed2d2bf4cb2ec017563 SHA-1: 8eee891cf503f2c878c55d943d32834f6bf4fbdd SHA-256: 5ed1a6b2eff1da2f4ef824b543aa62bae8615ca4aa7a4b437013191cf6b2e79e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site. ClamAV detection and ML classification confirm the malicious nature of the file, identifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to creating diagrams in Excel, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=creating+venn+diagram+in+excel
    • https://nuvosukive.weebly.com/uploads/1/3/4/7/134718285/ritam-paxotofukupep.pdf
    • http://bigno.space/85209704783s3kk3.pdf
    • https://cdn.sqhk.co/fojevimexu/haImygg/77048050964.pdf
    • https://cdn.sqhk.co/navozaxezini/hjfjfhh/30161005735.pdf
    • http://kagogumo.iblogger.org/a_field_guide_to_lies_critical_thinking_with_statistics_and_the_scientific_method.pdf
    • http://cardio-natural.info/luvufexo1z7.pdf
    • http://cucoupon.info/excel_formula_if_then_change_font_color4jtlu.pdf
    • https://rixogeki.weebly.com/uploads/1/3/4/6/134693266/4bf9107cb1f5a0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nexuvojof.epizy.com/kiziromirivane.pdf
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_78536e2fa1864c82b03886bc1378f7e5.pdf?index=true
    • https://s3.amazonaws.com/xowasosuf/video_editing_app_free.pdf
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_c4b41a66d63a4e4984e55fedb1a18be4.pdf?index=true
    • http://xifetofaramil.rf.gd/lone_survivor_game_guide.pdf
    • https://s3.amazonaws.com/baritexovopa/full_website_er_free_software.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_off0000dad8.bin
3ab267a69c000d8d3c24380c04444f578706764ad797ef7c0d2d99c6c0f72198		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 5116 bytes
font_01_sfnt_off0000ec2f.bin
e2d31557e7e58eea1ed365844f241c6b48ef6edcbd164366f2382a52e1f9b6e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 11156 bytes

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