Malicious PDF — malware analysis report

Static analysis result for SHA-256 9768a06a6808477a…

MALICIOUS

PDF

86.0 KB Created: 2021-03-04 03:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 13af0db43b1de52ee42c529886c9f4bd SHA-1: 473fb85952e0fea0213c6b48fcb9c98f81ff6a38 SHA-256: 9768a06a6808477a58a00a0f7f56d85c3bed14df16c3b54fcf54619959e6a860
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating an external URI and a lure to execute commands via the clipboard. The document body, though heavily obfuscated, suggests a theme related to 'unblocked games at school'. The primary attack vector appears to be social engineering, prompting the user to interact with the command line, which would likely lead to the execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://fokemale.ru/wix?keyword=unblocked+games+at+school+200 PDF link annotation
    • http://milanomoda-italy.website/developing_tactics_for_listening_transcriptllbfp.pdfIn PDF document text
    • http://flowerport.market/manufacturing_engineering_manager_job_description5xgun.pdfIn PDF document text
    • http://bazazodagipaju.22web.org/sebedadobik.pdfIn PDF document text
    • http://ropukejak.22web.org/ourtime_dating_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fadanade/xiexlIf/charades_ideas_for_adults_uk.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/46965813241amuu5.pdfIn PDF document text
    • http://wowitaly.space/euroset_3005_manualu0k9m.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/kohler_20kw_generator_owners_manuale17um.pdfIn PDF document text
    • http://converstarget.ru/turn_off_emergency_alerts_android_htcekekw.pdfIn PDF document text
    • http://cesaregaspari.com/wooden_chess_board_amazontsu42.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/hba1fye/find_friends_on_facebook_by_email.pdfIn PDF document text
    • http://milanbeachs.space/fetemukilk7pp5.pdfIn PDF document text
    • http://vagiburenumow.iblogger.org/kejobe.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/h3ibhj9/zenovus.pdfIn PDF document text
    • http://tumbochka.space/zixafaxozepejitasu365p5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/furunumaroxun/moridizulugopasukisaze.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/29189167333.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/jinja_template_string_comparison.pdfIn PDF document text
    • http://xojabujujipeze.rf.gd/75144526008.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/cursing_emoji_android.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 5464 bytes
SHA-256: 68522335d81ed595106fa9d2f87447bbb4c410460c20dbb2b55c6a4afa1df65b
font_01_sfnt_off0001152a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152A 12192 bytes
SHA-256: 6ddf8a03a621bbdbab485a812886588884b97dbbf56337a2250314c230eb2add
font_02_sfnt_off00013cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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