Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0db6088d601c902…

MALICIOUS

PDF

33.5 KB Created: 2021-07-19 18:02:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7f7fc9ff686c197204ca426f705055e SHA-1: cd0393a0371f6a31aa5c084ace81ee23d4deadcc SHA-256: f0db6088d601c90230db5157ddbc1e273df714f184f6cec2fadee3fe0e5ecd1b
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body and embedded link structure suggest a lure to trick users into visiting a potentially harmful site. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the heuristic firings indicate a malicious redirector is being used, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/835599320/free-likes-on-tiktok-game-hack In PDF document text
    • https://delsys.com.tw/image/data/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-tiktok-accounts_GM835599320.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_off00003066.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3066 22740 bytes
SHA-256: f9dbcd290d147372e4a487725b23c9d6736ca422e82da89d386fad86dfc8a1d5
font_01_sfnt_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 17456 bytes
SHA-256: 68a974c9aa3c870eecc965d525ccb957938ff5f02ba9183d05fa54c35671def6

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