Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c00fe1f694b12a…

MALICIOUS

PDF

44.8 KB Created: 2021-06-02 15:08:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3dbc6d0040f29c768cf64129a3cdbabd SHA-1: 1bd10f86dca28307680eec40456e8a8c34b420f8 SHA-256: b3c00fe1f694b12aae107b77bf2b3621542e7eb071ccd291bce07ee2c12a69d4
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 0.9865

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.xyz/app/431946152/synapse-hack-roblox-murder-mystey-game-hack PDF link annotation
    • http://viemeo.fr/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://viemeo.fr/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/roblox-cheats-for-android_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://viemeo.fr/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/free-tiktok-accounts_GM835599320.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_off00005063.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5063 24904 bytes
SHA-256: c4c16716068e053ac0fa5ff463ecb99e75d57985ac065eaa3e1a43ed21a7d825
font_01_sfnt_off000089b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B9 19152 bytes
SHA-256: 5f806b33419ceed90ab572c334850c35ce6bac11547fce36fc1ddf2399e70659

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