Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e7db15f6ac5bac…

MALICIOUS

PDF

33.2 KB Created: 2021-06-22 01:35:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ae598b57806aff69111abda219103cb7 SHA-1: c93bec5d25e3317788d5a259f03fc5041022d627 SHA-256: 48e7db15f6ac5bac11819f88f52e80d24b592ac0704c0698b1183faee776a671
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.co/app/406889139/coin-master-daily-spin-link-game-hack. These links are presented as lures for game hacks and free generators, aiming to trick users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

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/406889139/coin-master-daily-spin-link-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/tiktok-free-play_GM835599320.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-mobile-cheat-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-robux-code-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-face-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hacks-for-build-a-boat-for-treasure-roblox-infinite-blocks_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-money-on-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D36 21928 bytes
SHA-256: 1e431fddfab750ba00afa3fd3594d17acf9a3ada4a088c1e6f1cd8f89d7e67a7
font_01_sfnt_off00005dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 18600 bytes
SHA-256: a27276a21c997510c8d2741f1e08c7d679e7dab820b7a459a2ffd9e9d28be08b

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