Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d2340dc66d56dd…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 15:47:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 331dbb6bb4c38454386f61ae25da03cd SHA-1: 4423655c613d16cc75177c7a55dba565bdd4ce57 SHA-256: 72d2340dc66d56dd3ac611cbc28398f44c9d76db3b1436c9ca27858df25556c9
200 Risk Score

Malware Insights

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

The PDF contains a lure for game hacks and displays a fake CAPTCHA, aiming to trick users into clicking embedded links. One prominent link, 'https://netcdn.online/app/431946152/roblox-island-royale-aimbot-hack-game-hack', is identified as a malicious redirector. This suggests the document's primary purpose is to facilitate initial access via spearphishing, leading victims to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • 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-island-royale-aimbot-hack-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/to-get-free-robux_GM431946152.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_off000052ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52ED 26304 bytes
SHA-256: e49be2fd88a78c5b2863e8cb861efa2ae1f3829e1d18c31274ec9459e6284618
font_01_sfnt_off00008e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E20 2936 bytes
SHA-256: 916b11be10f0ffa1ebd680d716301a4082435ec0602a7356f5ccddc80b512e8a
font_02_sfnt_off00009846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9846 19020 bytes
SHA-256: 719af0207fe5c768b413853ac7262ca804bf843a6c6b203dc559480c54c20425

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