Malicious PDF — malware analysis report

Static analysis result for SHA-256 3870f322ab61581d…

MALICIOUS

PDF

205.8 KB Created: 2021-03-14 02:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e04887459284504e7914c1547e61a79 SHA-1: 4964ce597c8c9aba6f473209537ecde07d696c6f SHA-256: 3870f322ab61581d427c7272ed5709a1f99464cd0e486bfeb46557ae1e472afe
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL leading to a suspicious domain, likely intended to host a malicious payload or phishing content. The document body, though heavily obfuscated, contains keywords that may be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://midufefew.ru/wix?keyword=shellshock+live+weapon+farming
    • http://japuwakimawod.iblogger.org/72019507378.pdf
    • http://zujewubowufonug.scienceontheweb.net/67960440697.pdf
    • http://gudutisiluzew.mypressonline.com/how_to_use_oster_instant_steam.pdf
    • http://xidasetetobuge.scienceontheweb.net/hotel_revenue_management_basics.pdf
    • http://kuzexamipapoxip.medianewsonline.com/3917693326.pdf
    • http://wijasagasipode.getenjoyment.net/82138085653.pdf
    • http://medilawibume.scienceontheweb.net/41756568611.pdf
    • http://figuxovutofid.mygamesonline.org/rafael_lapesa_historia_de_la_lengua_espaola_resumen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dojonuta/74864446628.pdf
    • https://s3.amazonaws.com/tinivukedeta/6229974900.pdf
    • https://s3.amazonaws.com/xefezesebusu/confidentiality_agreement_template_ireland.pdf
    • https://uploads.strikinglycdn.com/files/435ed62d-234a-425c-918f-046becccf672/enable_my_location_source_in_system_settings.pdf
    • https://s3.amazonaws.com/vixuwogetiv/audio_technica_lp60_wireless_speakers.pdf
    • https://uploads.strikinglycdn.com/files/b267ab47-1380-4bfc-b8d1-eaf743deb48e/activities_to_improve_listening_skills_in_the_workplace.pdf
    • https://uploads.strikinglycdn.com/files/c28ad730-2f91-4414-865f-bf04c4bb12f9/how_to_replace_a_oven_heating_element.pdf
    • https://s3.amazonaws.com/buwosevax/31769825562.pdf
    • https://uploads.strikinglycdn.com/files/ad416e0a-a73a-4a48-80b1-cb3a75156367/73003750151.pdf
    • http://godoxozipozav.epizy.com/61519240468.pdf
    • https://s3.amazonaws.com/nemafu/ronozaponopenurumilaf.pdf
    • https://uploads.strikinglycdn.com/files/809d1bdd-c220-4e35-9ed1-5aa636defe5a/an_inspector_calls_historical_context_bbc_bitesize.pdf
    • http://gijewitog.rf.gd/61673235882.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_off0002ed38.bin
8a970cfc25ad023d2f7a7b3340e3ce7906aa09dca8173f5083685d1e044ca709
pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED38 5748 bytes
font_01_sfnt_off000300bd.bin
7eae7b6f3ee5143fd0477bbe9aa7da8390bd719f3c1fba0c5309026e8342ae7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x300BD 11992 bytes