Malicious PDF — malware analysis report

Static analysis result for SHA-256 6656db69c7eef896…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 18:53:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2f3627338d97898362caa0b1aba0f83e SHA-1: 091a4d3a10c37aa1ceccea6b85d4ea6c72d952f4 SHA-256: 6656db69c7eef8967ad591b77fdbcda0b13fec3ee6b2168ffc341771c1bb6d77
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains a lure for free in-game currency (Robux) for Roblox, directing users to a malicious URL. This is a common social engineering tactic to trick users into visiting potentially harmful websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-free-robux-website-game-hack PDF link annotation
    • http://autoskola-scp.com/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-free-robux-map_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-into-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-roblox-stuff-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-no-scam-no-survey_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-password-hacker-generator_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-hack-999999-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/knife-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/robux-hacks-that-actually-work-for-everyone-on-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-clothes-on-roblox-on-tablet_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
font_00_sfnt_off00002e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E71 22244 bytes
SHA-256: 93581cf42df4e821c90e8c8d5a5d98e2b5286ee5fafdc84dd2ab7e3eff577a2a
font_01_sfnt_off00005fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAE 19212 bytes
SHA-256: 4b1e8e9c88347b3f29ea09d9c43ed0e523ec5f5ba27152f0fbcfe198ff1f6a17

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