Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cef137691f5d9fd…

MALICIOUS

PDF

46.9 KB Created: 2021-06-07 10:53:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c00f81210ccedec73eabf4aa1ff53e9c SHA-1: 248dd3da8d9aa375e02de819d940aebb26ae3b10 SHA-256: 9cef137691f5d9fd21ec522ed4a43a2beccb75b400d67b08a6aa4b4f6cc01c24
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 0.9769

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/roblox-codes-to-get-free-robux-game-hack PDF link annotation
    • http://ivanitskyvs.ru/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/ragdoll-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/roblox-hack-tool-for-robux_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://ivanitskyvs.ru/images/free-tiktok-followers-no-downloads_GM835599320.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_off00005001.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5001 25212 bytes
SHA-256: 8bcf5e91ccc1ca63a9007cc965c9e84afe00f4c5b97969fa69ebc7c3fe650235
font_01_sfnt_off00008a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1A 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9404 18368 bytes
SHA-256: d87009efc003b26ca561f220f2cfaaf109e0b775327be9faa1e8de7d1b0dae8d

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