Malicious PDF — malware analysis report

Static analysis result for SHA-256 2019e70e5e2845e0…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 19:20:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4b2406f41c4953ed5ac4aa9b4f45fa42 SHA-1: cc5f0d2b7ed596153d47464f3858273e1aa18026 SHA-256: 2019e70e5e2845e0f23ab29758d5504915500ee4a657b501cec8b41302a1f8b5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free Robux generator' and a 'game hack', directing users to the URL http://netcdn.tw/app/431946152/free-robux-generator-no-human-verification-or-survey-2021-game-hack. This URL is flagged as malicious and likely leads to a phishing or malware download site. The document's content and the embedded URL strongly suggest a social engineering attack aimed at tricking users into visiting a malicious site.

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/431946152/free-robux-generator-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-hack-into-robloxs-top-model_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/city-architect-money-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-cheap_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/games-to-get-free-robux_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_off00003053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3053 22696 bytes
SHA-256: d111a0811803cde93eac72bb4b32233886bfc25a1accdec1dcb07f37ab7cc29e
font_01_sfnt_off00006323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 20028 bytes
SHA-256: 862718f3553914d13e7050f30ddf7e0bf5fdf78324d2cf1d5c4be66b223f3a80

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