Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64e0e151b606c68…

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 01:21:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 97db14cfbb27a616fbad80d508330111 SHA-1: 1a6487842c2f110e75f3da339e010a5f04e4177f SHA-256: b64e0e151b606c681d85f36e4461ec9eeaf67850bc92dfc63b9885b74d445624
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a lure of 'Free Robux Generator For Kids' and 'CLICK HERE TO ACCESS ROBUX GENERATOR' to entice users to click on embedded links. The primary link, http://netcdn.tw/app/431946152/free-robux-generator-for-kids-game-hack, is flagged as a high-risk redirector, strongly suggesting it leads to malicious content or a further exploit. The ML classifier also identified this PDF as malicious with high confidence.

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/free-robux-generator-for-kids-game-hack PDF link annotation
    • http://www.inoxograde.hr/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/slurp-hack-roblox-download-17_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/is-pubg-uc-hack-possible_GM1330123889.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/qtx-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/fast-easy-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/pubg-uc-free-2021_GM1330123889.pdfIn PDF document text
    • http://www.inoxograde.hr/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-2021-without-human-verification_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_off00002ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC6 22948 bytes
SHA-256: 3a07395bd2d6f0bde55da3442666c8cdd45bc4021dc550cb9a8f165ac63627ca
font_01_sfnt_off0000622d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 19112 bytes
SHA-256: bfd1a83f6845c5ddf7ed6c77f5c6ea2f08ed895d31f12c1f792f1c6eedabde29

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