Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c60cb6de50f680…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 20:58:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 23879c5da69349734457abf5b40105be SHA-1: 6a8c661cd4575540a75e8f6e5569f7284321855e SHA-256: c0c60cb6de50f68057a3651b7e05ab107381740d257c3beedda6481d9b1b464a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free in-game currency. The document body and embedded links strongly suggest a lure for users seeking cheats or exploits, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/easy-coin-master-hack-without-verification-game-hack In PDF document text
    • https://kojak-group.com/userfiles/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-uc-pubg_GM1330123889.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/get-free-lives-on-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
stream_004_off00005272.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5272 25488 bytes
SHA-256: d21a46db1319286ad9549467bfc8299b15a35363c10673976d79dbc727cce803
font_01_sfnt_off00008b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2D 18532 bytes
SHA-256: 85e2e278d23887cfad26fbfbc1b407b9b567820416a2cd1414c6df36cb3b2203

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