Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e65198aa8d4346…

MALICIOUS

PDF

45.8 KB Created: 2021-06-04 02:36:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b5d0b129c527fd364acdc20e8e4b5b9 SHA-1: 16c03ee58dd50de91af450377d3d625cfbd7c6ad SHA-256: 71e65198aa8d43465d9f6ab49fef18aa675657c57e250c267db19c9945b2cdf1
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 0.9864

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.online/app/431946152/robux-free-online-game-hack PDF link annotation
    • http://oca.undil.tl/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/pubg-uc-20219_GM1330123889.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/tiktok-free-robux_GM835599320.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-easy-no-download_GM431946152.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_off000050be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BE 29128 bytes
SHA-256: 33835f65221141b537ee1bef75b815cf4964bff714b00f85195e1e727a07a9fb
font_01_sfnt_off000090ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90EE 18208 bytes
SHA-256: 9c6e6aa5efa9903ee4d2fc70532f13b8880c04837d913a4df075592e4b137fb6

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