Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d879ccdde24d37…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 11:42:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ba4461f6c77b32cd38e2722061140494 SHA-1: f6b1eeb116ae090162a1afb6c89355a88476d272 SHA-256: d2d879ccdde24d37b4f2b87f71554e6e383f0af380a99ee2ee8242a2101c650a
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 primary redirector URL is http://netcdn.tw/app/406889139/freespinandcoin-game-hack. The document body and embedded URLs suggest 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 indicate a high likelihood of malicious intent.

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/406889139/freespinandcoin-game-hack In PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/roblox-kick-off-hack_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/cheat-code-roblox-hunter-simulator_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/lazy-blocks-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/how-to-get-free-followers-on-tiktok-without-verification_GM835599320.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/roblox-games-to-download-for-free_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/free-l-robux-2021-roblox_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/free-robux-in-real-life_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://mtsn4kukar.com/__statics/gudangsoal/files/how-do-u-hack-roblox_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_off00003289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3289 22812 bytes
SHA-256: 01072d32fd5d5ac762c90cfcdb1043dc64299bc94897a3ad423898eab9cff71b
font_01_sfnt_off00006591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6591 18244 bytes
SHA-256: 19494bed36003fadbe02431e250c62ef1698fa422030438aed600d934fd3a9e1

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