Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63ac70e602c891b…

MALICIOUS

PDF

32.9 KB Created: 2021-07-19 02:55:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 40abed31ae239ffd5555cfbb83cdc3f1 SHA-1: e6d708c913bedb8e6884be2fae5d47bed127e220 SHA-256: b63ac70e602c891b69e63a49bf204f31468f308ad244e23bc7f20009b3f113aa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with "free generator / game hack" themes. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically flags this behavior, indicating a likely attempt to redirect users to malicious content or phishing pages. Although no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest a malicious intent to exploit user interest in free items or cheats, likely leading to malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/835599320/free-college-textbooks-tiktok-game-hack PDF link annotation
    • http://aimp-market.ru/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/free-tiktok-views_GM835599320.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://aimp-market.ru/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/minecraft-for-free-on-phone_GM479516143.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_off00002d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3E 22424 bytes
SHA-256: f3c13cba05db813bf1979532f85d3d0062c7dc77a9f322991209e268c0e011c8
font_01_sfnt_off00005ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF1 18184 bytes
SHA-256: c51aa8ed87b8ee8755a1ecd789814fb67703fc10c946440f5ae6e88abb0f8eda

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