Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcfb28976e5b943…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 19:27:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e89f74ebf189f6f04ee1290bafd2a7ab SHA-1: 657580b41375fc5e7e6e9beb3323428cac8cdb3f SHA-256: 3fcfb28976e5b943faa34098ddd625a692fe329ccd42e58a7de2a75dcd8f919c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and lures users with promises of free game currency and hacks, directing them to external websites. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-spin-and-coin-blogspot-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or redirection attempt, likely to a site that hosts further malicious content or exploits.

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/free-spin-and-coin-blogspot-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-printable-black-and-white-roblox-valentines-day-cards_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-hack-apk-android-oyun-club_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-mods-download-free_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_off0000312e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x312E 23228 bytes
SHA-256: 77b7cda8ee9d1e9ba50d5448aa6a225233abe33371104bd40adfaa3ad7eb991b
font_01_sfnt_off00006553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6553 18636 bytes
SHA-256: c3aa12ee7babdeb6c0b1a9811f65e7fb6200b21c28f2df6ba84a692599b93025

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