Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e85530308aba2e…

MALICIOUS

PDF

33.9 KB Created: 2021-06-26 08:39:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8296007571302dabc5ab95b68edd6434 SHA-1: 512e503c4806fe17a3ffdab8a4a83f7b569d3b72 SHA-256: 51e85530308aba2e97ea3817c2ca4573c8c614e0b08b23eb90b9737b383e7d8a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game-related lures, such as 'Roblox Sex Hack Download'. These links likely lead to further malicious content or malware downloads. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malware distribution campaign.

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/roblox-sex-hack-download-game-hack In PDF document text
    • http://tckontrola.hr/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-h-robux_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://tckontrola.hr/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-shirt-templates-for-roblox_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/minecraft-bedrock-download_GM479516143.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_off00002dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFC 22012 bytes
SHA-256: c6bc66f58cb44b6f47090339088be66faf64ee91b9c0aa48dcf5fff24493e468
font_01_sfnt_off00005ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECD 19160 bytes
SHA-256: 328aeecd0b9dc2368f09ae1f28eb8035c21a8d58eacf93589f0ff74eb4bbfc10

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