Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b9c18a21eb28de…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 01:13:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 01ce20817cb22c7b832f39e39759c1c2 SHA-1: d8e54c1db7bdc3366595d769c24739a628e1d09f SHA-256: 91b9c18a21eb28de66ab28f40c23f4ba4a39b4a951c3f431fecdd4f4dacb6938
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to redirector infrastructure, masquerading as free game hacks and generators. The primary lure URL, http://netcdn.tw/app/479516143/is-minecraft-dungeons-free-game-hack, is flagged as malicious. The document's structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely for further exploitation 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/479516143/is-minecraft-dungeons-free-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-hacks-legit-no-survey_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/pubg-uc-upi_GM1330123889.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/robux-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/haktuts-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
font_00_sfnt_off000032a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A6 22648 bytes
SHA-256: 272ed5889130a91654caa0686f8bc425381f3449a59aa96a5a5a0b3c10f360fb
font_01_sfnt_off00006547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6547 18304 bytes
SHA-256: ce690126d5ef6938f3c3401fec90eb29b657d34ca06495398573f2a883063706

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