Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58326582888dd9e…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 00:48:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 42814f66f0ef9e67bfcbe46a7d6616a3 SHA-1: 2988bd8bfab58f758ea7a28786fa49a9d9fc65cd SHA-256: b58326582888dd9e07cbed47a5111fdcb3e676418423de698bdf5eac0db2008a
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/431946152/free-exploits-for-roblox-game-hack PDF link annotation
    • http://autoskola-scp.com/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/play-roblox-for-free-no-downloading_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-roblox-accounts-forums_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-hair-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/near-tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/mobosurvey-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-arcane-adventures-hack-script_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/35-000-robux-for-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/tuto-free-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-package-roblox-2021-july_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-unlimited-coin-master-online-tool_GM406889139.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_off00002ef3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF3 23004 bytes
SHA-256: 2bf61e055342b96b985d2575a58cf90b916538b2aa6cb7ab9d1c22f4dac7d4b2
font_01_sfnt_off00006262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 19048 bytes
SHA-256: 8972ce61ac0675ac16da68eab1f4f783fddbc9932eaa3946beb9ca390a13086b

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