Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f3c91052410298…

MALICIOUS

PDF

44.5 KB Created: 2021-05-17 20:37:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bff44bf393b9d9f66757d5dba8659223 SHA-1: 09a0a082da4d204ea690df2f77789eb5ec71873d SHA-256: 61f3c910524102980fc30ccfaab82b326e36cf47deb2cc83129755c135e432d6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a malicious URL. The document body, though heavily obfuscated, contains references to game hacks and URLs, reinforcing the lure. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves social engineering users into clicking links that lead to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/http-appsmob-info-coin-master-hack-game-hack PDF link annotation
    • http://www.yes-info.fr/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://www.yes-info.fr/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.yes-info.fr/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.yes-info.fr/images/google-play-coin-master-free-spins_GM406889139.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_off000048db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DB 24784 bytes
SHA-256: 2c1d5921ec07bf068bb4dcfd5e56a2604ce193bc66dd0ace21d28991d0129b7b
font_01_sfnt_off00008176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8176 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B28 18308 bytes
SHA-256: 0953d93c21b53bfb1f31fa823a9d7d14e5862c498b99c1777eb7f5d92d60cab0

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