Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ceef97c4fc02fe…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 20:03:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 80f947286686dc62957d7693d800b1ae SHA-1: 822e23ec00cacefc7ab92f52c048ecbe777b3aed SHA-256: a2ceef97c4fc02fe2b38ac793944153ba9b35daab61d5d1b5ebd3c43e680bd12
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and 'game hacks', directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the embedded link. While no scripts were extracted, the document's structure and embedded URLs suggest it is designed to lead users to potentially harmful content.

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-real-game-hack PDF link annotation
    • http://www.natconveyors.com/uploaded_files/userfiles/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/pokemon-go-free-friends_GM1094591345.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/como-hackear-phantom-forces-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/how-often-pubg-uc-turn-into-cancer_GM1330123889.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.natconveyors.com/uploaded_files/userfiles/files/spin-free-coin-master_GM406889139.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_off00002fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD0 22728 bytes
SHA-256: 174a09636c1b5bff14133f15045bf0534ce9747b1321eb394aea72f6e85c7bf0
font_01_sfnt_off00006307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6307 18788 bytes
SHA-256: 4bc1fb5241f7d1727492069c2276e888dd2add0fc79522b75a602c51baadbe08

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