Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8ad4ee5fa8ff94…

MALICIOUS

PDF

44.0 KB Created: 2021-06-04 01:37:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d6c6e02b98b6ea4b13a4f256f625b22a SHA-1: 025346886345c8d372ec5e068a3548aed770800d SHA-256: cf8ad4ee5fa8ff94bc4df5706046f80ba0ffeee8a3ea3d48966ed443aa866e40
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 0.9865

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 https://netcdn.online/app/406889139/best-site-for-free-coin-master-free-spin-link-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-pc_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
stream_004_off00004fd4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD4 25208 bytes
SHA-256: 6b834e308972d201dd0cacf7b7ef3e9374f10a9c0437a33d9287204e77d6a794
font_01_sfnt_off00008940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8940 18272 bytes
SHA-256: ca1d5c85fdffad6772495688e388105cc3e45c07940918e965146369a91d2d3c

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