Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b71be9e14e94b76…

MALICIOUS

PDF

45.3 KB Created: 2021-06-10 23:40:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0d219423cad6e670b0bb06ad7b863aa8 SHA-1: ac130afbf1499e6d57fcc9fda2fb39a2c0caba49 SHA-256: 0b71be9e14e94b76b8de426210cf86283306287340acf3bbffec9ac2435929f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically disguised as "free generator / game hack" lures. The document body, though partially corrupted, contains text related to free Roblox accounts and Robux, reinforcing the lure. The embedded URLs and the heuristic firings strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/free-roblox-accounts-with-robux-and-obc-game-hack In PDF document text
    • http://vagency.us/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/robux-free-credit_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/april-1-fools-hack-roblox_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/free-blue-jacket-roblox_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/roblox-hacks-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/coin-master-links-free-spins_GM406889139.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_004_off000050b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B4 26456 bytes
SHA-256: ca797af99ffad52c4595b2847405835aaf48b09864a77b676068e2bb5e9a22d4
font_01_sfnt_off00008d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D17 18848 bytes
SHA-256: ea1cda30337f02ba9461431c0b1724274e53b1e6566d1536c8f920ae60cb9637

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