Malicious PDF — malware analysis report

Static analysis result for SHA-256 c649398c8fc60770…

MALICIOUS

PDF

39.0 KB Created: 2021-06-19 23:35:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3e313697ec87a669c7d3032cb1b6cfd4 SHA-1: c91d472e8861cf5d7b15535421189d1e8963e183 SHA-256: c649398c8fc60770823fbd7fec31c1e4959872cceccea2c9f11c47f9c0bdcde3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirector infrastructure, disguised as game-related content like 'free generator' or 'game hack'. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it links to a redirector designed to lure users into downloading potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/roblox-how-to-get-free-hats-on-roblox-high-school-game-hack In PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-cheat-engine-download-2021_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-lua-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00004078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4078 22848 bytes
SHA-256: 86b54d9eda9b20ec211045ace487a88858a88c9d7161afeaf318e181c34523ec
font_01_sfnt_off0000737c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 19204 bytes
SHA-256: b48d2ab40db3618a7ac7b7e4a3359441da9a5169a45013941416e331c42b48da

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