Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97559d817643e83…

MALICIOUS

PDF

33.9 KB Created: 2021-06-22 13:54:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d113d5c4ea65c84136e7d51eacfbb661 SHA-1: 2ed4c95b2a9cc8e934feb61a36fc6bc893fdf0d5 SHA-256: d97559d817643e83cd6b53b5ae9fe50bb7806e4994e3e1d9d0ed4a7c43372b62
82 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux' and game hacks, directing users to the URL http://netcdn.co/app/431946152/free-robux-by-watching-ads-game-hack. This URL is associated with a high-severity heuristic indicating a redirector for game hacks. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the document's content and heuristics strongly suggest a phishing or scam attempt.

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/free-robux-by-watching-ads-game-hack PDF link annotation
    • https://www.hearcolors.com.mx/img/blog/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/raindrop-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/tiktok-free-package-dialog_GM835599320.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C69 22116 bytes
SHA-256: 8c749e14a771099d321d40f7501cb30999fd2f62677e38003a307684e894ba01
font_01_sfnt_off00005d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D65 19660 bytes
SHA-256: f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87