Malicious PDF — malware analysis report

Static analysis result for SHA-256 d595157417ce9fa4…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 00:08:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0d348ec690aa645d7b0518a9dc783758 SHA-1: ff0c479345a71ffc291fc916f67136ba4ee3e511 SHA-256: d595157417ce9fa48e9f86c74e124c72483f99a8d8403f514d37e7faab7f5692
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generators" or "game hacks" for popular games. The primary lure is "how-to-make-a-minecraft-bedrock-server-for-free-game-hack" which redirects to netcdn.tw. The document body also contains numerous links to other PDF files hosted on htdvn.com, likely serving as further lures or part of a download chain. No scripts were extracted, but the heuristic firings strongly indicate a redirection-based phishing or malware distribution scheme.

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.tw/app/479516143/how-to-make-a-minecraft-bedrock-server-for-free-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-robux-for-cumputer_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-change-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/aex-hack-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-robux-no-download-no-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-vehicle-simulator-free-vip-server-link-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/invisible-hack-roblox-prison-life-withe-cheat-engine_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/barnes-roblox-destruction-simulator-where-everything-is-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-from-apps_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
font_00_sfnt_off00003198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3198 21748 bytes
SHA-256: e115d6e80d6e527169db7378a8953d04e0c15e55a1d5acf2491a8aa6e38dca81
font_01_sfnt_off00006137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6137 18836 bytes
SHA-256: 7d3c11488f6da4305f73d6680d299b897c090da3807d73220efe7f5f58af714b

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