Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c71bd7c75a4ffc…

MALICIOUS

PDF

39.7 KB Created: 2021-05-10 14:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7b93853d0d8e6fec816ac3d2d2a8c6ab SHA-1: 02e34b9fd9fa33f8ff1be842ee479980417692b6 SHA-256: 73c71bd7c75a4ffc9770f40cd4b1e718a0fcf11262d2bae6ee0f87d36cd3c471
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "free generator / game hack" which redirects to a suspicious URL. This indicates a social engineering attempt to trick the user into visiting a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://netcdn.xyz/app/431946152/roebucks-on-roblox-game-hack PDF link annotation
    • https://www.knjigebuducnosti.com/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/freespinandcoin_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
stream_003_off00003f40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F40 25784 bytes
SHA-256: aa0372b95d6fbffbbd8a180f258ed9b031e00b066f9954bb99007ab466e26afe
font_01_sfnt_off000079c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 18096 bytes
SHA-256: 660f2ad6d064874c4042e66c51e1deb22834a2626620b3d43ba9bd9331fe9e6c

Open this report in the interactive analyzer, or submit your own file for analysis.