Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1691026a9e262f…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 01:08:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e09180248c32b0f8c389c37e2da015fc SHA-1: 2ef7dfa714959e79dccd1e6ea5d6ddff6a33d252 SHA-256: 2b1691026a9e262fb733daf2804503481599a79007ce78f2c1d997fbfa0584c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free spins, directing users to a known malicious redirector URL. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-app-download-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-trade-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/cheats-for-roblox-running-simulator-2_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-robux-for-free-on-pc-2021-november_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/easy-robux-hack-on-phone_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/epic-mining-2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-bot-followers_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-from-inspecting-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-how-to-get-anything-off-the-catalog-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-reedem-codes-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-pokemon-brick-bronze-hack-download_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-builder-club-free-code_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-do-you-get-free-robux-fast_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_002_off000032b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B3 23020 bytes
SHA-256: 4b45800d0cb9da909284429c0a294234fc453e9caad16e0a7f070b86e60fdd4d
font_01_sfnt_off00006689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 18924 bytes
SHA-256: 1b56382f632ae2db992342fc87f733fb374852ec6bae1f300c626c22ef4d9336

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