Malicious PDF — malware analysis report

Static analysis result for SHA-256 681f327c5bba5049…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 21:40:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b4f54b5ae3d516d1c0d8f21db96c10cd SHA-1: 60978fa3b3c860cb0445cd3cff1cfd8a674439b6 SHA-256: 681f327c5bba5049feaf09a7d84131f1036e6bd73794afbf602ded7822834c29
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 0.9971

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/406889139/coin-master-free-download-for-pc-game-hack PDF link annotation
    • https://griyafirdaus.com/ckfinder/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-spin-coin-master-hack-2021_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_003_off00004a2d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2D 24792 bytes
SHA-256: e2a29484e12df1df732f8a3498b900b4816dabea5c6611e44915400cfb00a003
font_01_sfnt_off0000835e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835E 18444 bytes
SHA-256: b0499442804c302970887a2d9cba6ef3f31768e477807758de6572ac3a0df5c2

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