Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7c6f257f319876…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 20:38:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 23c1a157d49e969e49d518e2d7f59071 SHA-1: e20385c5d30ebd8be856f18f3ac1d122b752c04d SHA-256: ed7c6f257f3198767e952e241c96cd07de4ee773be3a2a8357ac8e1caebc48d0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a generator or hack for popular games like Roblox and Coin Master. The document body and heuristics indicate a lure for free in-game currency or cheats, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector URL suggests a multi-stage attack.

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/all-free-roblox-emotes-game-hack In PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-free-wings-edit-avatar_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-robux-now-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-online-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-password-hacker-august-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/getting-robux-w-cheat-engin_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-free-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/fe-dll-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/hex-number-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/gift-cards-free-roblox-march-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-bubble-gum-simulator-hack-script-pastebin-2021_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_off0000318e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318E 22688 bytes
SHA-256: f56ac71a986344360b164ada25d426af1ccebb0c45ee4102b1b0a960a15dc42b
font_01_sfnt_off0000643f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643F 19016 bytes
SHA-256: 4da6f69bf72d2325148bc01f2be2e686cc4831e88176677ad7a9a7d777c2bc8d

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