Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf605c1e3848878…

MALICIOUS

PDF

33.9 KB Created: 2021-07-01 22:43:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ce88462729193a7a0fcea66c49fec62d SHA-1: 79c51cc8b29b8968fce26bfead42bb6b701bbf2b SHA-256: 0cf605c1e384887801dd4599a4c8e964680b6a36491d27fbe11e80642da9b4d3
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a lure for game hacks and generators. The document body and embedded URLs reinforce this by referencing 'free generator', 'game hack', and related terms for popular games. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

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/free-roblox-rom-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-top_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/hack-para-roblox-robux-infinitos_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-i-cheated-for-this-axe_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-cheat-engine-bypass-2021-super-power-training_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-how-to-use-cheat-engineon-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-jailbreak-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-coin-master-cards_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
font_00_sfnt_off00002ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF8 22068 bytes
SHA-256: 492241f7fe983ad6751a8e3fd57c90ca9c4bc5bd5c8cae7a6c91f08f96fa9b21
font_01_sfnt_off00005ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 18908 bytes
SHA-256: 21b707b0c880d0715be1ac87f5a2f91013490b0fb3de44a4f079a8ef7329d86f

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