Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ad8c67f8f5024e…

MALICIOUS

PDF

48.6 KB Created: 2021-06-10 23:05:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1271c33bbd2168caaf57133ae1f59589 SHA-1: fc0a57dd8b84c1f52580b5721a25a9131585aa64 SHA-256: b9ad8c67f8f5024e04ce90615a7216c5c71b11b0da1f9444ec49f504ac7d5e89
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, likely a lure for malicious downloads or phishing. The document body and numerous extracted URLs reinforce this theme, pointing towards game-related exploits or cheats. While no scripts were directly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution (T1059.007) to facilitate the redirection or download, and the overall delivery method is consistent with a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/nike-roblox-shirt-free-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/whats-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/tiktok-free-folowers-twitter_GM835599320.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/pubg-uc-india_GM1330123889.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/your-bizzare-adventure-script-esp-free-2021-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spin-realme-products_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_004_off000051ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BA 26040 bytes
SHA-256: 60991ec7d5aca7d70794895b924918fdcd4f8182a3fc405db655f32305a1f1a9
font_01_sfnt_off00008db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB3 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC4 18508 bytes
SHA-256: 91653d5b0d8493286780e99ba6262bde065aaf1b339bce53028c55cfdc46d3bf

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