Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e21c199beb38716…

MALICIOUS

PDF

33.9 KB Created: 2021-06-19 12:25:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 40450ffb7870b08f50735011e6ad2ea8 SHA-1: d51b3c96f9beb35f56677b939ef7e71616d450b4 SHA-256: 2e21c199beb387169caae8f906fb877cd9462ada97e8029a486f02b803704421
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.co/app/431946152/google-how-do-you-get-free-robux-on-roblox-game-hack PDF link annotation
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/pokemon-go-accounts-free-list-2021_GM1094591345.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/roblox-gas-station-simulator-cheat_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.vadai.sg/uploaded_files/userfiles/files/roblox-mafia-cloth-for-free_GM431946152.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_off00002fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB1 21396 bytes
SHA-256: f2220097af9fdc045265f3b12bafb8733bc64d1d76f8d1553a866a29acbace69
font_01_sfnt_off00005e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6C 19388 bytes
SHA-256: 6144b6934ddf430d17ba0e94bc0070c8dd6b461f1e5c1238872767e75e23ea67