Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa2c94d52d3b58a…

MALICIOUS

PDF

41.2 KB Created: 2021-05-12 18:50:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 63397574d1e3b5cba7d219b30f474f65 SHA-1: 7b5dbb5d91688f899feb41289415b057baf44f83 SHA-256: 5fa2c94d52d3b58a5b889bb2f28f7654d6c8ebd28ca6304ef146713236bf6a1d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an attempt to redirect users to potentially malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-free-online-games-game-hack In PDF document text
    • https://linhkien247.vn/public/upload/files/robux-scam_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/roblox-but_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/roblox-free-skin_GM431946152.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_003_off0000493f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493F 24160 bytes
SHA-256: 3fa85731867fc8183fe60c8381acf21f34b3afa9377e3f5d9bb6073b2fc89932
font_01_sfnt_off00008016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8016 17900 bytes
SHA-256: 4b77619cba729584a62e96e7fd69b59749ae88ba583596c01091ec51b146d7ca