Malicious PDF — malware analysis report

Static analysis result for SHA-256 490f317bd671e345…

MALICIOUS

PDF

43.9 KB Created: 2021-05-11 21:19:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f2426eb6c4f5359ed02bfb27fc3cfacb SHA-1: 0951571cf0ef0ec642b6c11c45c1cd971be76303 SHA-256: 490f317bd671e345616dd4c8a02bc9b54bfb6fc44b739c42267e45661a4a7ad1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "game hack" that redirects to a malicious URL, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a potentially harmful site. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/daily-free-spins-game-hack PDF link annotation
    • http://mou16-murmansk.ru/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://mou16-murmansk.ru/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004661.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4661 24920 bytes
SHA-256: 126fa860a6276cffc7a19932488d92176e6d69853761a5624e32317257e98e48
font_01_sfnt_off00008000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8000 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000089ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EA 18064 bytes
SHA-256: c13d24b09dacab53a31a9a34c8affe100c305689843df97e3c31ade46cbd1ed9

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