Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9402b9514c62ea…

MALICIOUS

PDF

45.0 KB Created: 2021-06-09 17:35:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 75315bb1f64bcf17e868204872ad5036 SHA-1: 83e714f534061b336b374f0e15f46905a4bf06a6 SHA-256: be9402b9514c62ea5035d69e551b27bed51e2eef0703ca2c47fe7273820561e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators" to lure users. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple redirector links indicates a clear intent to lead users to potentially harmful content. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/hitbox-resizer-hack-roblox-game-hack In PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/cpat-hacker-in-madcity-roblox_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-800-robux-for-free_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_off000051f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F1 25200 bytes
SHA-256: 693e04dec9eb7112dee0defe5cbeaebed53928234f4d9e0bb2216da3d4bd0430
font_01_sfnt_off00008c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5B 18488 bytes
SHA-256: 8ebb487443924befbf4a10dc4234b73a40c7f3c1d7e1897804116433171b0d90

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