Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff22048c2828bd6…

MALICIOUS

PDF

45.2 KB Created: 2021-06-09 13:59:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa780ce4fbba2f306b353f8cf31f3419 SHA-1: 09c0c49c2bcd5929dc1723c1216aa0b848f3775a SHA-256: fff22048c2828bd685652a2374199159108923f7e28df6d0061e55db6c68ed16
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The primary link identified is https://netcdn.tw/app/431946152/hacks-for-prison-life-roblox-game-hack, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to similar lures, suggesting a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score indicate a high likelihood of a phishing or malware distribution attempt.

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.tw/app/431946152/hacks-for-prison-life-roblox-game-hack In PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-no-human-verification-no-survey-no-offers_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B3 26316 bytes
SHA-256: b091f365c9fc4afc41532b4af8710a5a624b6206cadea840a5da1f9a516b245e
font_01_sfnt_off00008d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D13 18620 bytes
SHA-256: 8af006398c91328e40f937888fc9e4576cf64b7d0b311d695cf224a25faa2ac3

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