Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92d88d7da398585…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 08:15:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9f006a22a71de42b9dfa189f13cbef61 SHA-1: d881cacea3cb8f16f7fac6b14f62dc39f8785efe SHA-256: b92d88d7da3985853d71db6efb6a5c71e002a2a8829062267ac623bede2d48c7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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 http://netcdn.tw/app/406889139/how-do-i-get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox-anniversary-free-card_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/hacking-game-roblox_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/free-anime-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox-noclip-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/free-admin-codes-2021-roblox_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox-google-play-free-things_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/hacker-00-roblox_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://www.mrscoreboardsworld.com/uploaded_files/userfiles/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000313c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313C 21988 bytes
SHA-256: af0b6ec734fcf226ce3b5dbd270a2a4dfd7e5577f679cf337e1eb18a821a6832
font_01_sfnt_off000061c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C7 18508 bytes
SHA-256: 58f26242c5951b489404be3a4c793668ca3cfed0460ba7a035672c4835f5579d

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