Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afa2ef2967e2c57…

MALICIOUS

PDF

49.2 KB Created: 2021-06-04 03:22:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4df38300c0caf0d33e2cfb6e33586287 SHA-1: 189a1ff2c1516dbffbf94a7b162eb26b9b39bdef SHA-256: 7afa2ef2967e2c57ef346e76ebb9dbde869735e483dfe36a97824f2946f85422
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 0.9796

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.online/app/431946152/rblx-gg-free-robux-game-hack PDF link annotation
    • https://library.um-sorong.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/my-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E7 28112 bytes
SHA-256: cdf4b095ef608695b5bfeaedb933a144154533b47606c370d4a6d54662405227
font_01_sfnt_off00009311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9311 2984 bytes
SHA-256: 11823e7797f21d927090dcd248b0f8aadfc1947c888f47c00ab90369a46db00f
font_02_sfnt_off00009d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D64 18376 bytes
SHA-256: 79d8ff6bb54f2bd25fce5899da6b269aa8d0d1da5a030d2c5dfc49c812010b5b

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