Malicious PDF — malware analysis report

Static analysis result for SHA-256 b817cf2ddf4187c6…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 23:59:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: afb1f0e0019a7d67627bc053719f6235 SHA-1: 3774de0b33e0cbe6772720121f35d5dbd04ed09b SHA-256: b817cf2ddf4187c67552850d672a461bf6fe77e481703a27aa4c60dd39742100
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the embedded URL is associated with a known game hack lure. No scripts were extracted, but the document's structure and content suggest it's designed to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery.

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.co/app/431946152/donating-free-robux-live-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-redeem-codes-2021-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/www-rbx-com_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-inject-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/booga-booga-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-spin-hack-apk_GM406889139.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_off00002dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD7 22900 bytes
SHA-256: 4a5aa125d54d22e57f8b66617fac03f929d21d69aa6da4bbbfee7bda8985c5c6
font_01_sfnt_off00006157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6157 19224 bytes
SHA-256: 4bfe57ae421ab6b580a34683cb92840709c77026879a045635bdf9b800035294

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