Malicious PDF — malware analysis report

Static analysis result for SHA-256 327b982e9aa28b21…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 08:43:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d3ae96346df431fa71a1105148f4272b SHA-1: bdb90fc61ff3f7664985083a1bf2cf343ebe46f4 SHA-256: 327b982e9aa28b21f0adb08547b9332d72bbb48e63aff780c5c9ebfc89248151
122 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'free Robux' and game hacks, directing users to external URLs. It also displays a fake CAPTCHA or human verification prompt, a common tactic to trick users into further interaction. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a malicious payload being delivered via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-no-human-verification-no-survey-game-hack PDF link annotation
    • http://mobtakerancell.ir/assets/uploads/pages/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/fbchampion_GM406889139.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://mobtakerancell.ir/assets/uploads/pages/files/minecraft-windows-10-key-free_GM479516143.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_off00005375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5375 26192 bytes
SHA-256: ca88d65f4ad1c20b9d33541eebf3a3b710fb69b0aa750d935f14adcaecf5f4a2
font_01_sfnt_off00008dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFA 19156 bytes
SHA-256: 339d1e55aee7c6169fc9e26e1541ea9d6c779f781f53a8c1d652dbe4fbeac478