Malicious PDF — malware analysis report

Static analysis result for SHA-256 4120440898691544…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 15:05:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 33e7db97a371e98835314b67508b379d SHA-1: dbbc368860ec39ccbf7889fcc393f4947b634e23 SHA-256: 41204408986915443ceab3ea1807c4c3b8bc7dc427dc497b02b4ee445ae3b5e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for game hacks or generators, aiming to trick users into visiting malicious sites. The ML classifier strongly flagged this PDF as malicious.

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.co/app/431946152/how-to-make-a-roblox-item-free-game-hack In PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/dayz-2-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/royal-high-school-roblox-how-to-get-free-money_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-online-cheat-menu_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-someone-in-roblox-easy_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-download-wurst_GM479516143.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_off00002f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F29 22744 bytes
SHA-256: 2b64227cdba4531ff89593383b464259e5485507e63b5ebdc86ad09b2571df3b
font_01_sfnt_off0000622c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622C 19544 bytes
SHA-256: 3f05c872608049ad7e3aaa04b23936f0610f6a48efe65007746923c5bae2fe02

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