Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09ef1c0c15ebe34…

MALICIOUS

PDF

92.7 KB Created: 2021-03-16 01:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c15b67694005820065b7812b0e8eda2 SHA-1: d873e7d38021574860ee2ada9110cc7cb9af623a SHA-256: c09ef1c0c15ebe34e748fef3227581d6d4e2b5147895d0a7506993c5d2fdd20c
136 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious. A critical heuristic identified a 'Clipboard command execution lure,' indicating the document likely instructs the user to copy and paste commands into a shell. This, combined with the embedded URL pointing to a suspicious domain, suggests a phishing or social engineering attack designed to trick the user into running malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=what+is+charisma+on+command
    • http://bewepovuzif.iblogger.org/14228578049.pdf
    • http://rivuxini.66ghz.com/2965784848.pdf
    • http://opt15.ru/whirlpool_thin_twin_drain_hose3j8m0.pdf
    • http://show-visitor.xyz/3364747436gdcl4.pdf
    • http://madifowagerotal.iblogger.org/chuunibyou_movie_sub_indo_mkv.pdf
    • http://guxetiz.22web.org/free_medical_powerpoint_template.pdf
    • http://torchqbfl.fun/best_weight_loss_diet_for_type_2_diabetes27tkc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jukezeluf/11493099219.pdf
    • https://s3.amazonaws.com/padosumifubobo/92048204268.pdf
    • http://zutoribi.rf.gd/58919754989.pdf
    • https://s3.amazonaws.com/pekatikisuruki/lavewegotoxaxi.pdf
    • http://tudutov.rf.gd/league_of_legends_ekko_jungle_guide.pdf
    • https://s3.amazonaws.com/viromibukoleliw/chicago_manual_of_style_heading_example.pdf
    • https://s3.amazonaws.com/wivunonovef/newspaper_layout_design.pdf
    • http://larujuzo.rf.gd/bsc_2nd_year_chemistry_book.pdf
    • https://s3.amazonaws.com/genedonapubefe/netflix_apk_for_android_8._1.pdf
    • https://s3.amazonaws.com/kefodek/tratamiento_anemia_en_nios.pdf
    • https://s3.amazonaws.com/gajakelegeza/poxapafizekurukawofebab.pdf
    • https://s3.amazonaws.com/tutasujal/ipcc_law_practice_manual_for_may_2019.pdf
    • http://fomideveli.epizy.com/what_is_alchemy_in_the_alchemist.pdf
    • https://s3.amazonaws.com/mamukawaxatali/court_reporter_meaning_in_tagalog.pdf
    • http://misofex.epizy.com/ruroju.pdf
    • https://s3.amazonaws.com/wibedubosateg/how_to_brightness_vivofit_jr_3.pdf
    • https://s3.amazonaws.com/dujepav/all_serial_song_pagalworld.pdf
    • http://tabojiterakan.rf.gd/dream_girl_full_movie_worldfree4u_480p.pdf
    • https://s3.amazonaws.com/zafaronivaj/cocoa_beach_weather_surf_report.pdf
    • https://s3.amazonaws.com/zidenigad/case_study_format.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f0.bin
fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 6588 bytes
font_01_sfnt_off0001066a.bin
96e5395b33f368ba75619b10edf5b496ed69d9028a8174355246104ce2fbc6d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 5160 bytes
font_02_sfnt_off000117c9.bin
af0154cd2a322d8d82c0b4b905e49f9f3c036e662eb9b20313c6b725aad31fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117C9 5600 bytes
font_03_sfnt_off000128e7.bin
05b1a75d4c54dbfe1d2897ad7a35c6464c416635197124db7ea58d04a56d7bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128E7 11020 bytes
font_04_sfnt_off00014e98.bin
55efd0b51410ecbc320efe148a6c104c7c4a4033e3ba2ea0387787b4025a6765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E98 16188 bytes

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