Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc12d0a7693657f…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 08:22:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a905195cc7ff0393b842d27ff96910fa SHA-1: e267757980c807257d049fb457b654613051ed6b SHA-256: ebc12d0a7693657f2400b6259f55dc4a8896ada5778d710a9932421962a3803c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary URL, http://netcdn.tw/app/431946152/april-1-roblox-hack-game-hack, is identified as a malicious redirector. The document's content and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further malware distribution or credential harvesting.

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/431946152/april-1-roblox-hack-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-medieval-hood-of-mystery_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/22-500-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-hack-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-on-the-payment-section_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/descargar-hack-sunset-city-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-64-rom-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-to-take-roblox-eye_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E61 22256 bytes
SHA-256: 98b7977c94b505ec8e139ded88c99316bcfb127c4ef6121c2dcf1c345ce85515
font_01_sfnt_off00005ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF7 18872 bytes
SHA-256: a6b62ca9c393d0761f03a52c9c5257417507c630c92fe508e3d3dba79856d875

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