Malicious PDF — malware analysis report

Static analysis result for SHA-256 61869b2b40bd4379…

MALICIOUS

PDF

45.0 KB Created: 2021-05-14 21:39:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 34394cd0998dbf4558f47ddd0e8fa3a9 SHA-1: 8b4a9d7e82308bbbd16e0f7c54f495e7f6b6e186 SHA-256: 61869b2b40bd437972f7eade180115a564ff8ce7a256428baa3b1974ad397bfe
102 Risk Score

Malware Insights

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

The PDF document contains a lure for a "Coin Master Hack Spin Generator Tool" which links to a malicious URL. This URL, along with other similar URLs found in the document, likely serves as a redirector to download a second-stage payload or phish for user credentials. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/406889139/coin-master-hack-spin-generator-tool-game-hack PDF link annotation
    • http://artistaone.co/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/body-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-pe-free-download_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_off0000495f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495F 25800 bytes
SHA-256: 1b593197ffebac42946ad169e83c41f1c8048d61767bba6a5e2607ae7b8ae0a8
font_01_sfnt_off00008439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8439 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E53 17968 bytes
SHA-256: ea67d54f04c33a937dae932ca1fc44fc221a1b4b4b4a53e5a275faf6159c5a59

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