Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef1babd87780ff6…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 04:13:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b4b175ce0eb66923a962deb3a742ec07 SHA-1: 09a8613c9655f220ee3d0c156819c712b7188694 SHA-256: eef1babd87780ff6dcdf8946654d0acbd6b1468104ebc33b81b465939b6aac74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically targeting users with a 'free Robux' lure. The document body and heuristics indicate a social engineering tactic to trick users into clicking malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/how-to-get-free-robux-2021-without-human-verification-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-hack-roblox-ios-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-miner_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hacks-para-roblox-online_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/minecraft-ps4-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_004_off0000528d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528D 24892 bytes
SHA-256: aca99441fdf2a35b17fdf76f57957939cfdc63fdf5a2e8132c752477a4f5af0d
font_01_sfnt_off00008c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1D 19792 bytes
SHA-256: 360def3c5462935c27d34eeffd93966bb448cbc38fa74aa3553f45430a5a2fa7

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