Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f03b5f3361fd68e…

MALICIOUS

PDF

34.9 KB Created: 2021-07-07 00:33:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6de95c20f026b0087750f8adfaf794f1 SHA-1: 58ec91004c19d37df7c677cde9abb3506191c280 SHA-256: 3f03b5f3361fd68e2fd240bb3cdb7cde1ea25e1f10489bb285f8aff13bee756c
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 the URL http://netcdn.tw/app/431946152/free-robux-no-scam-game-hack. This heuristic firing, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample, but the embedded URLs and the nature of the lure suggest a phishing or scam attempt.

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-no-scam-game-hack PDF link annotation
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-sexually_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/can-i-have-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/cardcode-pw-free-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/hack-de-roblox-dinero-infinito-en-rocitizens_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-uc-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-tab-font-free-download_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_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_off000031ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BA 22444 bytes
SHA-256: e7a2ebb37cf9ca41ed15bc62cec94d20102d54a076cf6e7c6c563dce274ad35d
font_01_sfnt_off000063af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 18976 bytes
SHA-256: 23e221c5b5bcf2e3198359e0ed97b75398f02e20f829eab4584d68e40cba0ed0

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