Malicious PDF — malware analysis report

Static analysis result for SHA-256 053213d5826618f0…

MALICIOUS

PDF

44.6 KB Created: 2021-06-11 09:00:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9d5492f780dddba2a352bce2459afc8b SHA-1: 170a1124a76ab1fe6d2e8f31b3285c76b24d9dc8 SHA-256: 053213d5826618f05abc9655a42d97d093ca8e6ef1e5fe2dfa2eab3217540955
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-hack-tool-download-free-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-btools-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-admin-hack-55-download_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/is-it-bad-to-hack-your-friend-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-free-2021-generator_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/jailbreak-roblox-hack-mac_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-into-roblox-acount_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-in-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-on-mobile_GM431946152.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_004_off00004ff2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF2 25924 bytes
SHA-256: 98169601767c13185d24c46b209236153e6e52ae37b324fbd90c0c155d570060
font_01_sfnt_off00008a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A22 18852 bytes
SHA-256: 8cd5aad88c22f748360e68c3023f33a2660361567e6bcda1371acdbfba98c3f3

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