Malicious PDF — malware analysis report

Static analysis result for SHA-256 975490251e76d35d…

MALICIOUS

PDF

33.8 KB Created: 2021-06-28 09:13:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ad1947c0dee407cf5273439c83f566b3 SHA-1: 0c33e51631c82d576c4534d92b208df4725112eb SHA-256: 975490251e76d35d64270aa49b04d4e0387774fec636724b2df93a6779809028
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted on 'netcdn.co', which is flagged as malicious. The document body and embedded links suggest a lure for game-related cheats or generators, likely to trick users into downloading further malware or visiting phishing sites. 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/431946152/roblox-someone-thinks-im-hacking-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-dominus-roblox-event_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/logo-roblox-cafe-gfx-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-health-hack-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-capatcha_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-sharkbite-free-submarine-script_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-pubg-uc-free_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-premium-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/parkour-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-download-roblox-strucid-hacks-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-and-coins-today-gift-reward_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_off00002d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D91 22180 bytes
SHA-256: 7908c1d221bc38879ed3c312b97eee43331d3f4d3726ea3c7df2432e3226ac8e
font_01_sfnt_off00005ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED2 19200 bytes
SHA-256: 9b160f6702eb9d577b93e55bc397fc480865e25ac7fa6354057977651629e224

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