Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f19d98e88529a7…

MALICIOUS

PDF

47.5 KB Created: 2021-06-08 23:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b9a59e87ea83a68cff0b6c0f5e16ed80 SHA-1: 43590f7f5ac3314bf3cf4939d1d8898ab1857fcd SHA-256: 18f19d98e88529a793b15ce815384b1bad082891aaf67b1b87507ee0aba3c4a2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a 'game hack' lure, specifically targeting popular games like Roblox and Coin Master. The document body, though partially corrupted, contains references to these games and a URL that likely leads to a malicious site or a download. The presence of these lures and the ML classification strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/how-to-get-free-roblox-without-downloading-anything-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/roblox-cheat-engine-table-08-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/survivor-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-a-roblox-account-using-inspect_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-2021-easy_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_off00005440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5440 28208 bytes
SHA-256: 8ed89df43ea0d9861ecf7e5fdf2536b313e70d2e11ded7fe45076594c14a73e3
font_01_sfnt_off0000929c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929C 19880 bytes
SHA-256: eb5ebc04dfb280f0628e9e0045c2cc8b8734425b96d67c3204701e16f999e6e2

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