Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f32831b37e677a8…

MALICIOUS

PDF

45.1 KB Created: 2021-05-16 09:47:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b6e5ee605c280604f1911ac6ed65ac7b SHA-1: 52525ea649cf1374d604c34a86542f041af982c4 SHA-256: 4f32831b37e677a8c31d656c8158ed20d80e28ba577b68f7537d3b8036645494
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are advertised as "game hacks" or "generators," a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/coin-master-game-for-pc-free-download-game-hack PDF link annotation
    • http://damvallei.be/images/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://damvallei.be/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://damvallei.be/images/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D1 25236 bytes
SHA-256: f875c622c98a761e81c809e048ca10ad945cb301d9a4bb22e74d8963a957e015
font_01_sfnt_off000082da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DA 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8B 18704 bytes
SHA-256: 304c27b49b7701e6eca363f90b67191ef4a313196315ba7cb2c5eae1ddefa16d

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