Malicious PDF — malware analysis report

Static analysis result for SHA-256 9839eb2825c2545b…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 17:18:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 31f1e4816a85e48aa5416d0ddde730aa SHA-1: d6fb918da9b2f4fe6505b5928851c37b41c4bd8d SHA-256: 9839eb2825c2545bebfd0597f9abff662409c885d2153a9c11c4ea1fe212f6bb
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically mentioning 'coin-master-hack-game-game-hack'. The document body also contains this URL, reinforcing the lure. The presence of a 'password-protected archive handoff' heuristic suggests the linked content may be an encrypted payload, intended to bypass initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-hack-game-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-knife-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-a-roblox-player_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-obc-and-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-people-easy-on-roblox-web-site_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-cheats-and-secrets_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/whats-a-code-for-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-viseo-not-clickbait_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/what-tiktok-free-views-app_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-ios-app_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/just-go-to-mobihack-robloxhack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/youtube-free-robux-x-daniel_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/inquisitormaster-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/rcm-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-money-in-vehicle-simulator-roblox_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_off00002e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4F 23412 bytes
SHA-256: 540d996af5b785dc93df50026f0185129690153f02ce3a41a53aa782c4e7b91d
font_01_sfnt_off0000633f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633F 18264 bytes
SHA-256: 2c73ebf7d2de528526554eae41b5dd46ec69da4f53548459fc1d852cab5602a0

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