Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7cb39c68deb99a…

MALICIOUS

PDF

42.1 KB Created: 2021-05-10 15:16:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 06d56a888d17371e7a2b3507d6f52d2b SHA-1: 21cf087a624d40b9224247387df6ede922379b67 SHA-256: fd7cb39c68deb99a5c846a697ead398d12bc05fcc82610a870ab5814733e4513
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 0.9977

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/www-roblox-robux-game-hack PDF link annotation
    • https://nyomansuwirta.com/assets/CKImages/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://nyomansuwirta.com/assets/CKImages/files/free-spin-link-for-coin-master-game_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_off00004459.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4459 27104 bytes
SHA-256: 8e56c5f329635d56e6eaa720ee8471cc388715e89d5553a11b81acbcc27e2ef1
font_01_sfnt_off0000823e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823E 18284 bytes
SHA-256: 78b116fa1ee868f0b0d7434088deeaef50c2dd7920df139fcc6e1eb836a1517c