Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f8330ed49f4f0d…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 03:56:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e604f52f5edf74905db6f497d46142d5 SHA-1: b16af0823d9b370c955adc2688eb3f0b76cc306b SHA-256: a0f8330ed49f4f0dd25243981ee8b049fbe368081e7d4a98b07bf481464e681d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to websites offering game hacks and free in-game currency, such as for Coin Master and Roblox. The primary link, http://netcdn.tw/app/406889139/fb-coin-master-free-spins-link-game-hack, is a clear lure. The document's structure and embedded URLs strongly suggest a phishing or scam attempt, likely intended to trick users into visiting malicious sites or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/fb-coin-master-free-spins-link-game-hack PDF link annotation
    • http://library.ulb.ac.id//repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-hair-roblox-code_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pastebin-com-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-diamond-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-vip-cheats_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-by-downloading-a-game_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/jailbrak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/casper-hack-roblox-jailbreak-noclip_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-in-roblox-zephplayz_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/phantoms-forces-roblox-hack-weapon_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pokemon-go-free-and-home-transfer_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-pastebin-no-save_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-hack-no-confusion_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/i-succ-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pokemon-go-free-exp_GM1094591345.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_off0000309c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309C 22676 bytes
SHA-256: 3df03dd9b47422dc3ae961a02d069a508919c22a8a523827c3e1fd8db8f18f6b
font_01_sfnt_off00006378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6378 18504 bytes
SHA-256: 4eacd226e81bffa6b4d713579153edb2c015fcb01c54d6f1ee3529ce8e6b5986

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