Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7fcd75ba13aa080…

MALICIOUS

PDF

46.4 KB Created: 2021-06-07 09:26:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6c032ba901e0f8004296dbe5d94e6724 SHA-1: c568a6f83c6b1295b1871a4073dd2c56f9d8a176 SHA-256: a7fcd75ba13aa08067f81f90abbcfb8e673fac9b42f94ddf62d70f8c1f47c62c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains multiple links to external websites that promise free game currency and hacks, a common lure for phishing and malware distribution. The ML classifier also flagged this PDF as malicious. The presence of numerous URLs pointing to game-related exploits suggests a campaign to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/best-ways-to-make-robux-in-roblox-for-free-game-hack PDF link annotation
    • http://gruporamos.do/images/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-download-minecraft-for-free-on-windows_GM479516143.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_off0000547e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x547E 25684 bytes
SHA-256: 636dbd6891ed000aae48e80389a590332cdabc50922ae28b4e5cf8c23b5da426
font_01_sfnt_off00009016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9016 19164 bytes
SHA-256: a5483bf317ff5ede94cf758c0559433c924fdc8eaf1016b203c181a06e98723a

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