Malicious PDF — malware analysis report

Static analysis result for SHA-256 89da81d5e539210b…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 14:08:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fd0b3aac68b96a047817f7e59ab62c76 SHA-1: 787e4a9b82abfda6251ab14981ec05ba3c709cba SHA-256: 89da81d5e539210bb21700c042fafc45325bbab7cec2a9a2688dfb925cdb0912
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure, specifically for 'free coins' for Coin Master. The document body and extracted URLs reinforce this, pointing to various game-related hacks and cheats. The primary URL, http://netcdn.tw/app/406889139/free-coins-for-coin-master-game-hack, is likely the initial landing page for a malicious download or phishing attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-for-coin-master-game-hack PDF link annotation
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/pokemon-go-free-walk-android_GM1094591345.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-just-join-group_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/banning-a-hacker-lol-roblox_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/cheats-in-wolves-life-3-roblox_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/features-roblox-robux-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/rbl-gg-free-robux_GM431946152.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_off000034d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D2 23088 bytes
SHA-256: ffd6ad68a84f0bf3d49d98588ee62421acb648a1bf580b34e309edb102b49c2e
font_01_sfnt_off000068bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BF 17996 bytes
SHA-256: db592684bbdaaeb7647633841870edbd5981f70e843d3403859f62ceb8e0c83d