Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38e41227b85363d…

MALICIOUS

PDF

55.7 KB Created: 2021-05-15 16:23:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3648e5fc1484cf24019e4580ec38c141 SHA-1: 1641071a6778e6a698cc1a155a474c25c069f3a2 SHA-256: f38e41227b85363d4ee86065f8a0c548b0b4e568b834103880b02c35a8c7af44
122 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA and a "free generator" lure to trick users into clicking a link. The primary link directs to a URL associated with game hacks, which likely serves as a gateway to download further malicious content. The document's content and heuristics strongly suggest a social engineering tactic to facilitate the download of a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8407

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.
  • 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
  • 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/hack-coin-master-free-spins-game-hack PDF link annotation
    • http://artistaone.co/userfiles/files/united-gaming-net-coin-master-hack_GM406889139.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/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/i-need-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b04.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B04 28148 bytes
SHA-256: 7d4ecb9235d650052d55eb2d6028149be000645ceb36f7c4503948975e71badd
font_01_sfnt_off00008ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA9 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off00009674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9674 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA999 18056 bytes
SHA-256: f90826bfe2bc71c0265d319a9184b169c06436e7d3915f152a6a7ecd0e51099f
font_04_sfnt_off0000cacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACF 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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