Malicious PDF — malware analysis report

Static analysis result for SHA-256 620ea490deb66709…

MALICIOUS

PDF

42.8 KB Created: 2021-06-13 21:35:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1376bd6008df34b42e37e2cf0453db24 SHA-1: a2c8a534fe1204425de97ad7518452bc13285f22 SHA-256: 620ea490deb6670999b0c12519c5385d155597117a7759a53158865abdb9fd22
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that point to known malicious redirectors and infrastructure, disguised as "free generator / game hack" lures. The ML classifier also flagged this PDF with high confidence. The embedded links likely lead to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-do-you-get-free-vip-on-roblox-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-rich-roblox-accounts-2021-may-with-bc_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-gg-codes-2021-october_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-websites-that-scam-you_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-argent-sur-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/blox-fun-info-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-wp-themes_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_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
stream_003_off0000481e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x481E 25452 bytes
SHA-256: 9e7b5c200d5cf06b2549b62152bc29d2af0417db20cb9ea6b35d7f5f5f89607d
font_01_sfnt_off0000829a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829A 19116 bytes
SHA-256: 6d376ec65bda981d5509764ad03818ac88526a7a670e79d7fab742d5a062f453