Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc97938ac8957d8c…

MALICIOUS

PDF

36.2 KB Created: 2021-07-05 01:47:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dc9c5fc4305b4e000870831f7b1974c3 SHA-1: be5db77b02da1d70da9eb142053ac4ec1109a3b9 SHA-256: fc97938ac8957d8caf0dfb813ea9a7ec83740a62695fce2acd460af03ccb00a1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to 'free Robux' and game hacks to entice users to click on embedded links. The primary link, http://netcdn.tw/app/431946152/free-robux-2021-no-human-verification-game-hack, is associated with a high-severity heuristic for game hack redirects. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely leading to a malicious download or further exploitation.

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-2021-no-human-verification-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-q-to-speedhack-script-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-retail-tycoon-xbox-one-cheats_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-clothes-on-roblox-2021-on-phone_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hacker-finder-roblox-id_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/top-10-roblox-hacks-rolbox-fandom_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-hack-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3498 22368 bytes
SHA-256: a96f3db0f2bcb0ef60286255d13515ed908e3041741c59b73774ded0e568fd53
font_01_sfnt_off00006688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6688 19736 bytes
SHA-256: 415a8643b263bdb8a5e4ae51f1e0119ae52f9187a77a7c28158d674e6dc65c25

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