Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c42427b015f3e23…

MALICIOUS

PDF

35.0 KB Created: 2021-06-22 15:59:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 760bd709640e68add5c35911094cfff7 SHA-1: 332f2c7e7bc19f63df6111adfd2b8ed2bb41a7af SHA-256: 9c42427b015f3e23e8847cf4d8cf1b7d219ba5da7548f982c679f8f323381b27
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The embedded URLs, such as 'http://netcdn.co/app/431946152/roblox-hack-pw-game-hack', are designed to lead victims to potentially harmful content. The presence of a visual download button further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.co/app/431946152/roblox-hack-pw-game-hack In PDF document text
    • https://diendientuvn.com/public/upload/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-robux-generator-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/roblox-snyapse-free-dec_GM431946152.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://diendientuvn.com/public/upload/files/coin-master-download_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
font_00_sfnt_off0000317e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317E 22624 bytes
SHA-256: f260b1a1d9180850ac6e8b5546199571360295423973fee4fe083704dd3c3a79
font_01_sfnt_off000063bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BC 18976 bytes
SHA-256: f2b0be400dafd8516a26147e7156b7f3490fcb5a381449ca026ff2603d9c864f