Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b936fcb2c592edc…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 08:01:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a5bfc667b9174e7234cc682058a8d9b7 SHA-1: 877786b812a1492581aced79dc22ed728f3b5bd4 SHA-256: 1b936fcb2c592edc636b35ac2a1743f99ecec64f995fa63bba8c7bfec3b23492
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free items, directing users to external URLs. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous game-related URLs strongly suggest a social engineering attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful sites.

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-hack-2021-game-hack PDF link annotation
    • http://samavetpharm.com/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-jailbreak-hack-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-followers-on-tiktok-app_GM835599320.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-t-shirt-give-roblox_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/2021-robux-hack_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-tix-roblox-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/get-free-robux-without-doing-anything_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_off0000345b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x345B 22240 bytes
SHA-256: 141d0cc55500569d2bfcb3b752d0096c0c23034af16bcd8c777127d9df311035
font_01_sfnt_off000065b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B7 18428 bytes
SHA-256: 65ef7673dda910d5c1206c2dd7dddcbba7cd96e5a7782ef6ed0e94e119ec4adc

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