Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b813305d7ce3da3…

MALICIOUS

PDF

75.8 KB Created: 2021-03-18 10:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4da1df8cb207b4bf53272f42356c22bf SHA-1: 48d1e6f2951f15bcdfc13ecce0e1bf4351fb9f0e SHA-256: 0b813305d7ce3da3c0183648eee3e7cd92380fc34571def708d14498acf5e0dd
136 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 social engineering lure to trick users into installing a browser extension or update. It contains an embedded URL that likely leads to a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, and the 'SE_BROWSER_INSTALL_LURE' heuristic confirms the social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://vilenefex.ru/123?utm_term=hubspot+free+templates
    • https://cdn-cms.f-static.net/uploads/4446925/normal_6011a620e99da.pdf
    • https://cdn.sqhk.co/vatepasoxi/idw6gjX/promo_code_for_walmart_online_grocery.pdf
    • https://static.s123-cdn-static.com/uploads/4470685/normal_5fe2be63c1009.pdf
    • https://static.s123-cdn-static.com/uploads/4422914/normal_5ffe6e01d0e79.pdf
    • http://fenogavalos.iblogger.org/inflorescencia_flor.pdf
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5feb60c071bfb.pdf
    • http://nuraner.iblogger.org/uniden_dect_6.0_owners_manual.pdf
    • https://cdn.sqhk.co/nifodotiriru/mixheic/make_cheap_international_calls_from_mobile.pdf
    • http://lifolibi.sportsontheweb.net/what_does_it_mean_admission_without_status.pdf
    • https://cdn.sqhk.co/defisepeniba/ig9Cyhg/kezusofewudarewinaw.pdf
    • https://cdn.sqhk.co/fuluzagile/gsBRphg/html5_element_flowchart.pdf
    • http://pimupafigofud.iblogger.org/autocad_plant_3d_2018.pdf
    • http://dipenoguzel.sportsontheweb.net/why_is_my_ti_84_screen_black.pdf
    • http://wafowufopenu.22web.org/be_with_you_akon_song.pdf
    • https://cdn-cms.f-static.net/uploads/4482426/normal_5fe7e7f1f039b.pdf
    • http://fadekitexef.iblogger.org/zominevukewajamiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zigerakujig.rf.gd/sharp_air_conditioner_replacement_parts.pdf
    • https://s3.amazonaws.com/safenalavojuwu/autocad_drawing_template_dwt.pdf
    • http://bazodumijot.rf.gd/79871410188.pdf
    • http://xoxudexutuku.rf.gd/68937020862.pdf
    • https://s3.amazonaws.com/vofadoloves/35867391078.pdf
    • http://bemedaxo.rf.gd/action_director_video_editor_no_watermark.pdf
    • http://gezixus.myartsonline.com/cable_car_san_francisco_map.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_off0000eab5.bin
8a0cb56064db64eb5519a7e43b2695df0cd1d68f59dc3e0b6b33a62cd6d53e16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 5148 bytes
font_01_sfnt_off0000fc1b.bin
f6422083a2f261e50c7e5c7ba6c6bd168c63fe55bbc02bf6e8fb18da9ad18829		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1B 11160 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.