Malicious PDF — malware analysis report

Static analysis result for SHA-256 3557de2af39feb8d…

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 00:33:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc2ccc0b0ccb5519ffba571881b71179 SHA-1: 69d08fe28c5be0b42f904e474f96371a36e96222 SHA-256: 3557de2af39feb8d89d3bb05b5ea673b86981f8fbdbf7ad8ca9ce631ad84e399
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators for popular games like Roblox. The document body and heuristics indicate a lure to download or access these 'hacks', which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.co/app/431946152/roblox-ps3-free-download-game-hack In PDF document text
    • http://perpus.ar-rum.ac.id//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-speed-hack-on-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-get-unlimited-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-download-free-and-fast_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/robux-free-roblox-code-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/knife-hack-for-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-elemental-battlegrounds-hacks-win-10-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-robux-app-computer_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hacker-beta-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/get-free-spins-in-coin-master_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
font_00_sfnt_off00003049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3049 22248 bytes
SHA-256: ca5eb6c93c991f58ac9d7befd0453733b9045c9ae7713718f8b6d4743bb62978
font_01_sfnt_off00006182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 19484 bytes
SHA-256: 3fcac6837394fcebb5ee832db21b673e0f45b5e20ac76fb65013936efc3876a7

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