Malicious PDF — malware analysis report

Static analysis result for SHA-256 b115198eba83fe74…

MALICIOUS

PDF

44.2 KB Created: 2021-06-04 00:22:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4814c333a61012781a6342999e906d63 SHA-1: 30536f327947027006774b0c77e7d9e00547a763 SHA-256: b115198eba83fe7417b32f1f3dda81bdf651d5d980398041f2d963ff3941212c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The heuristic firings confirm the presence of malicious redirector links and a lure for game-related exploits. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely leading to a phishing or malware download site.

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.online/app/431946152/roblox-group-free-robux-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robuxs-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/login-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/tiktok-for-free-online_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-coins--spins_GM406889139.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_off00004f6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6D 25776 bytes
SHA-256: d92105cf1c7cd4544b9c5091bb2c61fc420944a668c8a2d7f9eb06dcdb46f283
font_01_sfnt_off00008a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4E 18264 bytes
SHA-256: b2792b9995997ff68e5dfa2acea2bbc639d657441038e216f117c3302624ca62

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