Malicious PDF — malware analysis report

Static analysis result for SHA-256 8650c7dc2ac076c3…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 11:50:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 57638e2438804eb1b98ab0103973f3f9 SHA-1: b7017840aac2594bdac0a8d2cf60e1c5e6fa37c1 SHA-256: 8650c7dc2ac076c36ac335c53dc10b48d37104b53669dcfbb6f54d4ee47a228b
82 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux' and links to a website that appears to be a generator or hack. The ML classifier strongly flagged this PDF as malicious. The embedded URL likely leads to a second-stage payload or phishing page, indicating a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.online/app/431946152/free-robux-2021-game-hack PDF link annotation
    • http://lib.akpnbahtera.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/woman-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-games-coin-master_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_004_off00004fc9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC9 35452 bytes
SHA-256: 945e2d66e0353f18f2b7de8781cff069ad9f9f9fe35ba6ac9334be0f383d8abf
font_01_sfnt_off00009b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B10 18416 bytes
SHA-256: a2c808792aaeb1607b9c3a91ae122c662faffffe8d42f3cf4118be6ccc5b3e7b

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