Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f56606dc7f3a3b3…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 18:53:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 72340be9003e1922c6a394049d6cb92a SHA-1: cc65249ea7fb91b7946ae66616ac970eab7e42c6 SHA-256: 0f56606dc7f3a3b37c57e5bc5c8e3b1628f337ee05e64d415e852dd01367995b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, that promise free Robux or game hacks. The document body and extracted URLs strongly suggest a lure to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the presence of embedded URLs and the lure content indicate a phishing or scam attempt.

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/robux-free-gift-card-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-song-codes-for-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-upload-audio-for-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-make-a-roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/top-free-commands-in-roblox-without-admin_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-hack-in-roblox-prison-life-on-ipad_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-not-crash-when-you-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-synapse-x-download-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-server-hacks_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_off00003162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3162 22224 bytes
SHA-256: 107a7726a051687754620e021bf2ec7643103ae73718603746e7474a60331034
font_01_sfnt_off000062b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B5 19112 bytes
SHA-256: 9469897dff8cab28ffda57ea4fb04243aaf5b849cb1d333b453ecf02c9debdd7