Malicious PDF — malware analysis report

Static analysis result for SHA-256 d715f46829bbaaa0…

MALICIOUS

PDF

42.9 KB Created: 2021-05-11 13:45:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6917b32d2df9b567670db6b998a8be09 SHA-1: dcf7ba0d85343a0f2dd67dad86b58da6a9bb4db3 SHA-256: d715f46829bbaaa054e6f4b78dfd0c8c10082f933d9483e73df13f1928ac868d
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-drop-master-free-game-hack PDF link annotation
    • http://www.riverkennet.org/uploads/files/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/free-spin-app-for-coin-master_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_off00004c35.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C35 25388 bytes
SHA-256: d1060a95de1eccbf5c46dcdf84cca1f377d207fe85ed0abe1523241a1c210787
font_01_sfnt_off000085f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F3 18056 bytes
SHA-256: 11f18688a2b2da9a5c9f112f1650d1ea79688667bc5daef8815cb9676fc0e265

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