Malicious PDF — malware analysis report

Static analysis result for SHA-256 181bf60bfa7d5e33…

MALICIOUS

PDF

46.4 KB Created: 2021-05-17 05:24:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4d0a0202d805fe62601eabc0306bfe38 SHA-1: aef5d3eed20b759ddad463fa519276afe5f66e3b SHA-256: 181bf60bfa7d5e33405e9c3e542478d6fdec7e5adb4b7375a4f4b9db551d5667
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 0.8948

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/431946152/how-to-get-roblox-credit-for-free-game-hack PDF link annotation
    • https://www.ausecus.com/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/roblox-earn_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/robux-come_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/toolbox-for-minecraft_GM479516143.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_003_off0000483e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483E 28056 bytes
SHA-256: e550c8c922c1bfd05d0e47d94a61f57a2ae7e356129298fad291e86b53d5cbc0
font_01_sfnt_off00008897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8897 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00009237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9237 18508 bytes
SHA-256: aaee93be15afea3f34265028f72e14c8d8177a28a7e511fa9958eeec3e94f784

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