Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7e38f3e43e2959…

MALICIOUS

PDF

79.5 KB Created: 2021-03-10 02:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35346b7e7c7f1b777dc77f15b52864bf SHA-1: bc5c41d0b241704ce13810cccc520db0fcd24d25 SHA-256: da7e38f3e43e295963684c1b4597c09e0fb936cf3baa3c021154fa4f69c96163
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of the external URI suggests the primary goal is to redirect the user to malicious content.

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://nipisod.ru/aws?utm_term=diy+fly+tying+vise+base
    • https://cdn-cms.f-static.net/uploads/4488566/normal_5fda8092d2159.pdf
    • http://mukinumatonewo.getenjoyment.net/basic_economics_for_beginners.pdf
    • https://cdn.sqhk.co/tibidimewako/ieoGOae/vosavu.pdf
    • https://cdn.sqhk.co/xegunorasu/Ogij3je/telehealth_nurse_practitioner_jobs_michigan.pdf
    • https://static.s123-cdn-static.com/uploads/4368503/normal_5fcf21873d1f0.pdf
    • https://cdn.sqhk.co/fusozuwalas/UJXTifz/68890466754.pdf
    • https://cdn-cms.f-static.net/uploads/4369309/normal_601588eb650dd.pdf
    • http://leledup.mypressonline.com/which_weight_goes_where_on_a_grandfather_clock.pdf
    • http://sevagawos.getenjoyment.net/99350902755.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fotiworoz.epizy.com/64214663056.pdf
    • http://jasunusemoki.onlinewebshop.net/42771320220.pdf
    • http://woxanegerofokox.rf.gd/bevel_gears.pdf
    • https://s3.amazonaws.com/zonebon/95604380546.pdf
    • https://s3.amazonaws.com/gazitif/whatsapp_status_video_saver_apk.pdf
    • https://s3.amazonaws.com/mikibetiv/international_business_salary_uk.pdf
    • http://wejufutaz.onlinewebshop.net/pharmacology_for_nursing_care_book.pdf
    • https://s3.amazonaws.com/febopa/nibalisojapuwudavir.pdf
    • http://nununad.myartsonline.com/joyetech_evic_vtc_mini_75w.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_off0000fa56.bin
9cda76ac8f71576f1e568415ca5d0d1700d2ef04a6ee0538d06dff20d57dba78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA56 5140 bytes
font_01_sfnt_off00010c0c.bin
4d35a53340bc8c51a9daccb60a721352edd5be98da8c3ca7a545c7aa4df9aa62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0C 10820 bytes

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