Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a3736b35f79234…

MALICIOUS

PDF

50.9 KB Created: 2021-06-03 22:02:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0b1a0147dc2c65961484563b8745703e SHA-1: 73360b82fabfd060bbf92ceb6be4043b50f79af9 SHA-256: 09a3736b35f792340d3fc54d2718e4224668ebab019f58adb7b3581deb0e96cc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded URLs that redirect to game hack generators, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest the document is designed to trick users into visiting malicious sites, likely for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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/roblox-hack-com-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-or-gotcha_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-tiktok-hearts_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_off0000571c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x571C 25408 bytes
SHA-256: df99e9d5e7d50513b4c04a3646fd44ba7371be145d81bc072bb9f052a3cf8132
font_01_sfnt_off0000920b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920B 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off0000a3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3ED 18440 bytes
SHA-256: 92e56247950081f5f8ea935637ec6d93dafa31aa334148af106ab9a8365bd2e0

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