Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4ff45eae97728b…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 06:52:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2734eb7db1ad546f7bfb2589897cff05 SHA-1: 2a7b812c84c529229090d944205296fa16e87fb4 SHA-256: 1c4ff45eae97728ba6688f279b394030c0457aee2dfc7f87b40b7c85c54d9c6e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'game hack' lure, specifically pointing to a URL that appears to be a redirector. The ML classifier also flagged this PDF as malicious. The embedded URL is likely intended to trick users into downloading malware or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • 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.
  • 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 https://netcdn.online/app/406889139/coin-master-game-free-play-online-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/tiktok-free-coins_GM835599320.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F0 24100 bytes
SHA-256: be1272fdeaa1f2c5b6ca20a6844a89a6de6d4508b9174f9d884063c91756122b
font_01_sfnt_off0000889e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889E 3380 bytes
SHA-256: cb8371cc187c45116d0984119c2893dd3db0d7f7d568d007a419406e6ca9f389
font_02_sfnt_off0000948a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948A 18380 bytes
SHA-256: b5bbbc623ea736b659451b361c4225dcdb8ece8dfba16a3ff4312aad2e8470ed

Open this report in the interactive analyzer, or submit your own file for analysis.