Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7ac1cb770e5718…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 01:51:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d486a83787454f1ad9353ca6791ef0cb SHA-1: ef71e5d892e15f7d7c030eaf300e8c4f5afdd5bb SHA-256: cc7ac1cb770e5718c0cdb7e6100f24f7a63e762cc8e61a41e99e2e9c7e9b2452
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary link, http://netcdn.co/app/431946152/bloxburg-roblox-free-money-game-hack, is flagged as malicious and likely leads to a malicious payload or phishing page. No scripts were extracted, but the PDF structure and embedded links strongly suggest an attempt to exploit user interest in gaming for malicious purposes, likely via a drive-by download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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/bloxburg-roblox-free-money-game-hack In PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/reddit-roblox-lumber-tycoon-2-money-hack_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/roblox-game-where-you-hack-computers_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/cheat-dungeon-quest-roblox_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/robux-money_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/app-master_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-robux-download_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_off00003004.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3004 22908 bytes
SHA-256: df0f24c006c39ab8d53a83274869e67097896634e7e96eb05d57ed3c053da498
font_01_sfnt_off0000639d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 19164 bytes
SHA-256: 50ff65c821b5c2dc98b8b0b99ecde1796e9425067a275caa7b4c454317b00529

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