Malicious PDF — malware analysis report

Static analysis result for SHA-256 6421e8284a53f9e0…

MALICIOUS

PDF

51.2 KB Created: 2021-06-08 20:36:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 93b985b087d20d949d8711ae06d1d4ef SHA-1: d2763b78f4fd23a4874f5d7e4ba9855416aacdda SHA-256: 6421e8284a53f9e036f01e9b4516d6d44cd4c4fb35dcf41b116e50d3fa75f61d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that promise game hacks and free generators, a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lures suggest the document is designed to redirect users to potentially malicious sites for further exploitation or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

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.tw/app/431946152/roblox-shirt-white-free-game-hack PDF link annotation
    • http://dismarinamt.com.br/images/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-robux-raffle-and-generator_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-limited-items-roblox_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/krnl-download_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/roblox-mad-city-free-car_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000505a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x505A 25372 bytes
SHA-256: 84ef6db20c7d715bb8a46779e0ab3398a3eeb5ae02e227405f1b5ca05eda5480
font_01_sfnt_off00008ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD5 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9777 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA489 18536 bytes
SHA-256: e9919e5e9f5570201425b3b21cbcc7ffb2ec54a51520d3774f4ca30de1cc5b50

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