Malicious PDF — malware analysis report

Static analysis result for SHA-256 348e8a7968a4c203…

MALICIOUS

PDF

43.9 KB Created: 2021-05-14 19:14:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d2283e45c8796a85e7b1d39b9aa4fcaf SHA-1: 1fcaa5b400f9bac03b1b500c40e206568bd64d98 SHA-256: 348e8a7968a4c2033990640e409873c5ec619a0ab9a686caba927eab898c4046
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and virtual currency, such as 'free Robux'. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document likely attempts to trick users into revealing sensitive information like account credentials or private keys. The presence of embedded URLs and the ML classifier's high confidence score support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-websites-no-human-verification-game-hack PDF link annotation
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/www-robux-com_GM431946152.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://e.mtsattaqwa10terpadu.org/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification_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
stream_003_off00004d2d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D2D 25360 bytes
SHA-256: fe2dd221f56d845cf96c7197bb4eeac9ac8f3c7e43180df4c760485d325d6e6d
font_01_sfnt_off0000870a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870A 19056 bytes
SHA-256: b278ed256549c6e4f6c448dba943d0e72c7f64ebe7340c12334ea4705f26c648

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