Malicious PDF — malware analysis report

Static analysis result for SHA-256 e168ed599e6770e4…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 08:51:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 207361a7f9ed26d2be2b73827ab1839d SHA-1: f434151bc97a0a9787d3c370e8b10471ecc4d819 SHA-256: e168ed599e6770e42798c8125c1086688b24bef239a7be50e2ab3ac84b8a444d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a lure for 'free generator / game hack' downloads. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the nature of the lures suggest an attempt to trick users into downloading malware or visiting malicious sites, likely delivered as a spearphishing attachment.

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/479516143/minecraft-free-download-linux-game-hack PDF link annotation
    • https://mtsn31jkt.com/__statics/gudangsoal/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/is-pokemon-free_GM1094591345.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/free-roblox-cards-not-used-2021_GM431946152.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/earn-robux_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/roblox-free-online-no-sign-up-or-download_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-hack-october-2021_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/how-do-you-get-free-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_off00003090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3090 21592 bytes
SHA-256: d306f0d8600eccb7015470b8e25587dd5aa3d5a7c9b26296e9a85875e1b7eb71
font_01_sfnt_off00005f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 18928 bytes
SHA-256: a6d6d3b5de8a59e9ac0f8784111a009c27ee8fccd7e6d0edb578a3cd59b44339

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