Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9dbf101adc6e98…

MALICIOUS

PDF

36.0 KB Created: 2021-07-03 17:33:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4aaeb40683e5470e75262fc66510b5c1 SHA-1: 6c1446986f4a594356d8e9a756c3511cff3436b1 SHA-256: 5d9dbf101adc6e9839b7cdaa3ffe64d17ae9bf8b167e18b10fc049c61aa410e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The document body and heuristics indicate a lure for game-related cheats, likely to deliver a secondary payload or phish for credentials. No scripts were extracted, but the presence of malicious redirector links and the overall lure 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-hack-xyz-2021-game-hack In PDF document text
    • https://purihostel.com/assets/CKImages/files/3-ways-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/how-to-do-roblox-wall-hacks_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/pokemon-go-free-offers_GM1094591345.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/roblox-spieler-hacken_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/roblox-hack-scripts-to-fly-copy-and-paste_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/hacking-is-allowed-roblox_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/how-to-hack-roblox-games-no-downloads-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
stream_002_off000032ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32EF 23348 bytes
SHA-256: 8d7104dcd799e712604cdab9bdb82570d11ae821c0701829357886026c5cdd02
font_01_sfnt_off000067d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D0 18896 bytes
SHA-256: 6196b08645be86931896c29a7b8527461e4ee1bb55985642a652b484aa03a2ea

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