Malicious PDF — malware analysis report

Static analysis result for SHA-256 082e8beebe7e0fa9…

MALICIOUS

PDF

168.2 KB Created: 2021-03-22 09:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dba597365791120e63a0ff26780e7644 SHA-1: 22c631afe82cab62fc6cc0ee721d3978aac92f4d SHA-256: 082e8beebe7e0fa9d92b7e58ebd23bbd8f03d2235962bf5030eb3c6adbf009ac
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document that uses a lure related to 'Autocad 2007 3d tutorial pdf free download' to entice users. Heuristics indicate it contains a remote support lure and a download button, suggesting a phishing or social engineering attack. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download and execution of a secondary payload via the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/strik?utm_term=autocad+2007+3d+tutorial+pdf+free+download
    • http://creditscoretracking.info/53214462697uroah.pdf
    • http://maddot.space/spanish_seasons_worksheetai8gj.pdf
    • http://feelslike35.com/clover_water_cooler_cleaning4k0mx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/somisilegex/formation_of_detrital_sedimentary_rocks.pdf
    • https://uploads.strikinglycdn.com/files/22088f37-ae98-4816-9d22-57e90cb56c49/wendys_menu_nutrition_carbs.pdf
    • https://s3.amazonaws.com/jawusawar/rpg_maker_vx_ace_rtp_free.pdf
    • https://s3.amazonaws.com/bodajaku/hedwig_s_theme_sheet_music_alto_sax.pdf
    • https://uploads.strikinglycdn.com/files/942744db-0f5e-4549-97a9-7e6e38fb9710/pekejevumaxivovopasi.pdf
    • https://s3.amazonaws.com/bagokiko/how_to_setup_hp_officejet_6500a_plus.pdf
    • https://uploads.strikinglycdn.com/files/35e15b9e-f69e-4f68-a6e9-dab66818867f/behringer_xenyx_302usb_review.pdf
    • https://s3.amazonaws.com/jeromisixinolib/50155322791.pdf
    • https://s3.amazonaws.com/gomaxod/wulebitivatexotiwat.pdf
    • http://fotiworoz.epizy.com/kadibusetuzose.pdf
    • https://s3.amazonaws.com/xeropizuwe/grim_dawn_pet_build_guide.pdf
    • https://s3.amazonaws.com/sezebepit/nipid.pdf
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_5a3cfbbedc14442da199ea00459003b4.pdf?index=true
    • https://s3.amazonaws.com/sisaxu/whats_happening_in_the_world_news_today.pdf
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_53b64b2a103d4471a9f7567536a4f150.pdf?index=true
    • http://xeganidirosup.rf.gd/angular_2_access_template_variable_in_component.pdf
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_cf72b66dc5f54affb61a37ebe0940b0b.pdf?index=true
    • https://s3.amazonaws.com/zosevid/kuk_university_distance_education_date_sheet_2018.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000240a3.bin
062fe3fa2c140f985195706c3e3f8c60c6f21a307e98c419ab12d484650a8e10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x240A3 5572 bytes
font_01_sfnt_off000253c2.bin
de154d93ba908df9e312923b973b1983a5de0c16ce706bfe0d73c227a871b8ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x253C2 12020 bytes
font_02_sfnt_off00027c70.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27C70 16204 bytes

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