Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78f0b4592953813…

MALICIOUS

PDF

33.9 KB Created: 2021-07-09 12:26:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0f57fd0dbafdd7d793e6359e80287c95 SHA-1: 34c5a1826ccf88b85686b8022f13a279df15a6ab SHA-256: d78f0b459295381322dc45a4e3474705f09db52abfe8d619ab5af7532eb59d99
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also explicitly contains this URL, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-coins-and-spins-for-coin-master-game-game-hack PDF link annotation
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/roblox-parkour-cheater-tag_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/cool-roblox-avatars-free_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/roblox-booga-booga-god-mode-hack_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/holocene-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/fps-free-roblox_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/new-btools-hack-roblox-9-5-2021_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/free-robux-cash-out_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/roblox-ticket-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/how-to-hack-roblox-with-notepad_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/roblox-royale-high-cheats-for-diamonds-2021_GM431946152.pdfIn PDF document text
    • https://lpm.umi.ac.id/asset/ckfinder/userfiles/files/coin-master-free-spins-today-daily-links_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
font_00_sfnt_off00003033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3033 21984 bytes
SHA-256: 0173f0a7a536b8d3292e62d7dca1519174d768222a7cca6a3e5f04fa8eb64b12
font_01_sfnt_off000060b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 18608 bytes
SHA-256: 91e5d49199ad9387aaf7021f2d04de29590db1476a75f1a5b44edbca12b063d7

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