Malicious PDF — malware analysis report

Static analysis result for SHA-256 656c88548346413b…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 07:19:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 526ee07a375a5355a0673e89304ab5dc SHA-1: f23f1ee3d83e61b3a8100cefd71b061d0674dc49 SHA-256: 656c88548346413be39873339b62b654f4bb60dd44b67327e05055eada6c9099
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/promo-codes-to-get-free-robux-game-hack PDF link annotation
    • https://ambasador.md/ckfinder/userfiles/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-dbfs-cheat-engine_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-blackberry-hack-download_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-brick-master-cheat-video_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-apocalypse-rising-hack-dll_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/get-free-robux-discord-server_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-epic-mining-2-cheats_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000338f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338F 22272 bytes
SHA-256: 7041d8d9224279ec2ce7614d699eb8c37246eb46aefdd3021e4c64a2efd80255
font_01_sfnt_off00006502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6502 19408 bytes
SHA-256: 33ce494440ad385d813675e202d0582184282b0a964bafd641ab8940aca64bdd

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