Malicious PDF — malware analysis report

Static analysis result for SHA-256 22715c7ce90ec16e…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 10:55:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7084519fd654e8b20aa9174f17759520 SHA-1: d6d73aa9d4cb0cde1d18e72c2e7865219274aa76 SHA-256: 22715c7ce90ec16ea1ce1a3985c0e50df28386537aba1687ad0fbe1e2ee67579
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/conscle-hacks-for-roblox-game-hack PDF link annotation
    • https://delsys.com.tw/image/data/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-printables-free_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-followers-on-tiktok-no-human-verification_GM835599320.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-catalog-all-free-items_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-roblox-hacks-for-jailbreak_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-free-robux-games_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_off00002eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EED 22440 bytes
SHA-256: d202b55a9a29307019f7e79e6dd7b0a9b1709da8101a3030f2b3430bba1bfefb
font_01_sfnt_off000060ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 18820 bytes
SHA-256: 4559f125dfd3a16d8e3bc94dda285951986d31b6accf2fa5138e7c9bd8c0203e

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