Malicious PDF — malware analysis report

Static analysis result for SHA-256 99049ed0c9fdf3c1…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 02:05:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7de9c582c93a3027f47820607d4b0ba5 SHA-1: a994e45b7443b9774b6d1d6db9a2d35080be8c5f SHA-256: 99049ed0c9fdf3c1e97c8e74220d50beb6b8fc40419528432be050e86d1bf71a
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/hack-coin-master-spin-android-game-hack PDF link annotation
    • https://library.fdk.ac.id/repository/roblox-phantom-forces-money-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-have-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-champion-bag-free_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/edit-avatar-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/get-free-robux-without-sighning-in_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-coin-app_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/youtube-how-to-use-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/dantdm-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-real-no-verification_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/code-for-naruto-roblox-free-spins_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/https-oprewards-com-roblox_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_002_off00003102.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3102 23548 bytes
SHA-256: ff193ce66e026ae006a2a527ab2e20f0ae4b69378061968cb49281e11cc51e31
font_01_sfnt_off000065d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 18352 bytes
SHA-256: a07aa63f24b352fd81218d8ca65e21e458501f47c11eb6d03a85a06766069f6e

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