Malicious PDF — malware analysis report

Static analysis result for SHA-256 973ee2a143cef659…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 07:33:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f270607ee3df2dc5e005e97a070ebd40 SHA-1: b4b32b30dcc2ffa83b1962a3017b2a5760762887 SHA-256: 973ee2a143cef659f9f7faee0acfebc774a2b94fbe315fd2d4f221d9ee7a6ff1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure. The embedded URL, https://netcdn.online/app/835599320/tiktok-free-like-generator-game-hack, is likely the initial point of contact for a malicious download or phishing attempt. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into navigating to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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/835599320/tiktok-free-like-generator-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/tiktok-free-like-generator_GM835599320.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/pubg-600-uc-in-indian-rupees_GM1330123889.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-earn-robux_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_off000049b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B5 25584 bytes
SHA-256: 1867783abad8412f7f852dfc1e57aa43a55d765632068e313a46f80957150e83
font_01_sfnt_off0000842f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x842F 2892 bytes
SHA-256: cdcbc32b63b790b69b09bf2604009b482027970fde8790a022f19c1422944118
font_02_sfnt_off00008e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 17684 bytes
SHA-256: 148b3eaf643cd6363de57cead37eb24f5f99e5343ece8e481df75111047997ed

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