Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c40233fa2051d1…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 08:27:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 69bf1a5984abe8c8dfb935a1c8517832 SHA-1: e79d4ef995edef43470289044a8160d3c1c76f84 SHA-256: 25c40233fa2051d18cdceaad38d9c57ffaf8b536575b8936c391c88fc0010cb9
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure for game hacks and free currency, directly linking to a suspicious URL. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to trick users into revealing sensitive information like private keys or passwords. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/coin-master-com-game-hack PDF link annotation
    • http://digilib.akperkabpurworejo.ac.id//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-tiktok-likes-no-verification_GM835599320.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/wurst-commands_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/2021-free-coin-master-spins_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_off00005098.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5098 24344 bytes
SHA-256: b200f6cc33e97537eff33af2ad1da4b7d56a854866e61e4a5b17a4cfa51557f0
font_01_sfnt_off000087dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DC 17808 bytes
SHA-256: 5f65e9ddf4afff1d2178ae18e232f1b2eabc64818bd3dec8ef63fd22011a84fb

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