Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f29e5c55ffc433…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 13:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f6fe8b860d4e2949952378663c1f10ec SHA-1: aab7ba03e34d2a3541e818d9dea3943314f5f9f6 SHA-256: e7f29e5c55ffc433ec5ad5f97eccbecc5ab7a133d341058aacc42473b719ab3a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/how-to-get-free-robux-on-phone-game-hack PDF link annotation
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/synapses-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-into-someones-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-island-royale-hack-script_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/unlimited-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-hair-roblox-not-decal_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/earn-free-robux-on-roblox_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_off00002ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE6 22464 bytes
SHA-256: 2220a590dbef39bc271d62df054cf50eed7b8799e76836c9ed6c88d9e71d9160
font_01_sfnt_off000060d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D3 19304 bytes
SHA-256: aa366a8b430bfcb45c9bf263411bccf6e6397de5dc8c3d1b4c1ff1d910733f52

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