Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff9a74c9b834104…

MALICIOUS

PDF

78.8 KB Created: 2021-03-19 15:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cee1d19822415ca57d70e463a60b039 SHA-1: 5c2b15c8041725659c54c77ddb9496252065867d SHA-256: bff9a74c9b834104559ed63a601f565e117e1f57da398b54bf59ff0401b879cb
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'leonvi.ru', which is likely a phishing or malware distribution site. The document's content, though heavily obfuscated, appears to be a lure related to a movie script, suggesting a social engineering tactic to trick users into clicking the malicious link. No scripts were extracted, but the presence of external URLs and the ML/ClamAV detections strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/award?keyword=spider+man+homecoming+movie+script+pdf
    • https://cdn.sqhk.co/xifinelire/ijfhgia/content_marketing_strategy_on_social_media.pdf
    • https://cdn.sqhk.co/pafatewodoju/je0ohaj/napajaw.pdf
    • http://idealicagocce.site/20698056656iw148.pdf
    • http://vonowaz.iblogger.org/jomagosomamokipopubaruleg.pdf
    • http://losinglotterynumbers.com/431646271389nz5b.pdf
    • http://zonuvak.medianewsonline.com/translation_geometry_worksheet_doc.pdf
    • https://cdn.sqhk.co/nurijodefa/aDjcIil/fibugagesabunive.pdf
    • http://desawigoxikugaw.mywebcommunity.org/elements_of_statistical_learning_book.pdf
    • http://raisinshub.club/88887622545ozqez.pdf
    • https://cdn.sqhk.co/pelopuxi/exjiih6/download_stickman_soccer_2018_mod_apk_android_1.pdf
    • http://belldiscount.ru/68067684813xpy97.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gevewodex.epizy.com/28083087953.pdf
    • https://uploads.strikinglycdn.com/files/2644bb0b-f9f7-4fa9-b3f2-f3f780686594/no-no_boy.pdf
    • https://uploads.strikinglycdn.com/files/c46faf16-3997-43ad-b370-821d1f90c57a/how_to_install_epson_perfection_v370_photo_scanner.pdf
    • https://uploads.strikinglycdn.com/files/2bf4da02-ca30-41e4-bf66-0e4bc8910cd0/healthy_breakfast_smoothie_recipes_for_diabetics.pdf
    • http://kegigija.atwebpages.com/venutopajisapezanijalabi.pdf
    • https://uploads.strikinglycdn.com/files/b3dfafa6-6341-46f3-8b4e-cef07abefe1f/nac2h3o2_compound_name.pdf
    • http://dugoneluxokudu.rf.gd/cloudy_with_achance_of_meatballs_2_images.pdf
    • https://uploads.strikinglycdn.com/files/1a85dc31-9ae3-4a4d-91db-c48fb556fee9/79590244216.pdf
    • https://uploads.strikinglycdn.com/files/34ba0a01-0bb1-4733-a955-665f425e9415/28324094391.pdf
    • http://dusetelonuzaj.epizy.com/9850864854.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_off0000f180.bin
3ccc41e65ce661077b12bf69de101166ce487b20ee1b2064a36564e6a5b26981		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 5700 bytes
font_01_sfnt_off000104c8.bin
5c866f8a61190e8739f3c788c9dd732c315585f8aab90c02cddae6da1cb91b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C8 11648 bytes

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