Malicious PDF — malware analysis report

Static analysis result for SHA-256 72194ea68f6a7b31…

MALICIOUS

PDF

35.7 KB Created: 2021-06-20 07:11:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b0b5da45e11687a05b75ea41f3b64af6 SHA-1: 8f22b7ace67f8cd872d554bc72b9564283825120 SHA-256: 72194ea68f6a7b310752cb7ea15559b8ca9a8d1a4add6c07c01e9347711738dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple lures for free game items and currency, such as 'Free Robux' and 'Coin Master tips'. The embedded URI points to a suspicious URL that likely hosts a malicious payload or redirects to a phishing site. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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/how-to-get-free-robux-no-verification-2021-trackid-sp-006-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rob-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-troll-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-apk_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
font_00_sfnt_off00002fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD4 22612 bytes
SHA-256: ef9b16630a960cba915cf37170ace77c97c7494e1ddcb994fa401c3cef65d7aa
font_01_sfnt_off00006271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6271 20364 bytes
SHA-256: a0d995ad34aa4e5d8688525c2265e79dd61fb25ebb5cdc2a6657012618e279b5

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