Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5aadc3ec4afe9a…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 08:55:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 86f8b3335aac1ac91cdb099a7b35993e SHA-1: 11bb66ff4741212e50634c3db5c8b5e0aa84f98a SHA-256: 9e5aadc3ec4afe9aa4cfb91404a9d616d8d27c112bb0f702b0f49d53fad60b1e
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/479516143/free-minecraft-mods-for-pc-game-hack PDF link annotation
    • http://razredna-nastava.net/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/cheat-engine-2021-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-paino-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-high-school-2-promo-codes_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-2021-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-any-item-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-use-cheat-engine-on-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-a-roblox-user-account-password-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-items_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_off0000326a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326A 21744 bytes
SHA-256: 3ec2e2af2eb515adbef06704069935f12ddb2d955c6a6be953fee73c86e81cb5
font_01_sfnt_off0000620d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620D 18324 bytes
SHA-256: ee1c19855408b16e2ffe5bd070dcc18f77e221a6cdc63e4ddeb47ffa0706d813

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