Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8eadda0cfcc34b…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 13:54:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 41605090ae3ee6ffbe6b8061e3d4f9c2 SHA-1: 62edf0b25d387be1b112fb7ec38339908fa44d3a SHA-256: fb8eadda0cfcc34bf64c45ee8147e4dc0cc1ecfaeb3a07dfcd36579b341af0e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to websites offering game hacks and generators, identified as malicious redirectors. The document body and heuristics indicate a lure for users interested in free in-game currency or hacks, which is a common social engineering tactic. Although no scripts were explicitly extracted, the nature of the links and the ML classification suggest a high likelihood of further malicious activity, such as downloading additional payloads.

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.tw/app/406889139/coin-master-hacks-no-surveys-game-hack In PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-hack-download-deutsch_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/another-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-tiktok-coins-for-free_GM835599320.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-clover-online-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-games-with-free-robux_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/robux-free-gift-card_GM431946152.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_off00003202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3202 21928 bytes
SHA-256: bb4a1522d8e1c5d01ce59a79cc44c5fa0a8d717322d22bcb1a4a95e98cecde03
font_01_sfnt_off00006235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6235 18440 bytes
SHA-256: b730959ae3980318038e04d6756c59d667f8505816f45f5bcba77c928df63dad

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