Malicious PDF — malware analysis report

Static analysis result for SHA-256 276ad386197893a6…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 09:48:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 18125f06df963c099dcb3e415f72424e SHA-1: f4f2cb9a51397dc064e861f7c56555f359484ed0 SHA-256: 276ad386197893a66f317bdf7454c0fa841dca896f72629309aa0aaa9a9f3f6f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to websites that promise game hacks and generators, such as 'best-roblox-free-roblox-avatar-game-hack'. This lure is designed to trick users into visiting potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/best-roblox-free-roblox-avatar-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-roblox-jailbreak-hacks_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-2021-easy-no-inspect_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-any-gamepass-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/city17-city-rp-roblox-free-guns_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheats-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-human-verification-or-survey-2021-easy_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/show-me-how-to-get-free-robux_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
stream_004_off00005212.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5212 25504 bytes
SHA-256: 2d923e808f9b71d9dd60463da8c7e1339b51ec1270d1794aaa30a4b3db3ebc7e
font_01_sfnt_off00008d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D11 18396 bytes
SHA-256: 6849741084af8125a31e037d7f61ee76908c6915c43a690323d62e4ed2c72627

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