Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af1056d605abfc3…

MALICIOUS

PDF

45.4 KB Created: 2021-06-08 23:10:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8d0109199d6df066828dfaeb5049e308 SHA-1: 20f90b2b7a458e5617fb19b9a135f98d447fdcfd SHA-256: 6af1056d605abfc31701d71aa7b5b3b9e7d7f3d705c283b12bdc0b7e0a886da1
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 0.9864

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.tw/app/431946152/como-ser-hacker-en-roblox-2021-game-hack PDF link annotation
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/no-virus-hack-roblox_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-hack-2021-apk_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_off00005251.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5251 25876 bytes
SHA-256: 377a9578577f00e2df15e4e723f1b0ed70d89400f397ed282e39dd6fa49cb310
font_01_sfnt_off00008d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D39 18844 bytes
SHA-256: ef1c6d9a2238b3eab8d3167fb9dca99f28a757b0b79ee1ea4d2f3f5798a3a727