Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d61b4424898b1f4…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 06:12:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2103a9acdf6f228c1eaa177ec2d5c667 SHA-1: 875b16698168c0104ba18032faefd54a7978cc58 SHA-256: 6d61b4424898b1f4ce70e5de99667dfa602f577cf09856d07419ed7eb76d0c24
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users into clicking a link. The primary link, http://netcdn.tw/app/406889139/coin-master-hacks-no-verification-game-hack, likely leads to a malicious download or a phishing page. The document's structure and embedded URLs strongly suggest a social engineering tactic to compromise the user.

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/coin-master-hacks-no-verification-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-robux-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/exploit-for-anti-hack-games-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/autohotkey-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-humen-varucashe_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-apk-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/optifine-mcpe_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
stream_002_off000032f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F5 23612 bytes
SHA-256: 9a84670f28669f04646fe82ef313934327e079f67db879abc57818941f6be51d
font_01_sfnt_off000068a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A2 18140 bytes
SHA-256: 584bd634a741abf14746247beb71184038551534d821baf642793c5d967f1edd

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