Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb50f1f7a1ea5ac2…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 23:12:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2244b184994e2fe1fc69208c1c653e04 SHA-1: 59711ea93c7e2e1886139936a1ed5b4eb3179815 SHA-256: fb50f1f7a1ea5ac2200c2b797da8200f27183ca2e9cc2a45dd14ff26c72feed6
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' and links to a malicious URL, indicating a social engineering attack to trick users into downloading potentially harmful content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. No scripts were extracted from this sample, but the overall pattern suggests a downloader or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-java-free-download-game-hack PDF link annotation
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/earn-robux-com_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-minecraft-java-free_GM479516143.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
stream_003_off00004af4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF4 25088 bytes
SHA-256: 4a62abbb8be0a15f1ff4e219b7b3253e719e5f76ebd4e24d7bcb2473f7005cba
font_01_sfnt_off000083b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B3 18572 bytes
SHA-256: 84d994c9ca9b5ef406cb0cbd16402c282b50396e13120ada9f75f5d4c4d42292

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