Malicious PDF — malware analysis report

Static analysis result for SHA-256 273229dfd1d9dd6a…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 03:16:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a1bfe936e4bc4c482cca2fcd436f474f SHA-1: d4a9e771224fc0ba56d82ea1848675707f4eee01 SHA-256: 273229dfd1d9dd6af6a0fc432e790d5e4a08556564f83c5ef4c806eae225bce7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free in-game items. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-free-box-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites, likely for further exploitation or malware delivery.

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/coin-master-free-box-game-hack In PDF document text
    • http://www.ma-plast.hr/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-skin-coluor-robux-hack-youtube-robuxianyoutube_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-free-robux-for-pc-2021_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-oof-combat-hack_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://www.ma-plast.hr/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/games-on-roblox-that-give-you-free-robux_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_002_off00002f0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F0A 22980 bytes
SHA-256: a5b76e4a4e10305f031aa51f8b3b26e604a3b69c943eace27308842ca3796452
font_01_sfnt_off000062cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CB 18424 bytes
SHA-256: 06e1a8abdfdbc1378574cba0468ab56135a39765f7a16652ed09c5636b933370

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