Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cdd0a98305d9d7d…

MALICIOUS

PDF

44.5 KB Created: 2021-05-12 22:34:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2ac507d03261dc63dda5d87a0dc3a701 SHA-1: 049a8ce5edee1cd5051580c77c5dc12deb6a170a SHA-256: 5cdd0a98305d9d7d6546e14c8ec02803851b7e683f9cbd21732071b1c7da1f89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body text and extracted URLs reinforce this theme, aiming to trick users into visiting malicious sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-free-spins-2021-hack-game-hack In PDF document text
    • http://gods-own.org/images/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://gods-own.org/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://gods-own.org/images/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gods-own.org/images/aimbot-download-roblox_GM431946152.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_off000045ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45CE 25876 bytes
SHA-256: 6af4cdfbb88959dbcbe5cb6173d92a941b8c5cc14e1035149405e3ce9fd56888
font_01_sfnt_off000080df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DF 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC9 18456 bytes
SHA-256: 01aac8443e047fcb7357b1b8ecb4a3fbe01c6e1da05f82155595583d2ef12cbf

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