Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd84d531c234a92…

MALICIOUS

PDF

33.9 KB Created: 2021-07-19 13:00:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3394e7774563db6d043bd92ef34178d7 SHA-1: 9621cb6e3d3108c5817ea99dddacf309b297b64a SHA-256: afd84d531c234a92ec9eca374f9903108ba86a76e033b19177fb0818d62be0af
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 game hack and free spin generators for popular mobile games like Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a scam or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it acts as a delivery mechanism for malicious content, likely initiated by user interaction with the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/coin-master-daily-free-spins-link-game-hack PDF link annotation
    • http://aimp-market.ru/images/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://aimp-market.ru/images/free-tiktok-followers-no-human-verification-or-survey_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/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://aimp-market.ru/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://aimp-market.ru/images/roblox-apocalypse-rising-hack_GM431946152.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/microsoft-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
stream_002_off00002da2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DA2 23120 bytes
SHA-256: a5dbfcc51133393e0cda860bad675adaa4e9cad8e67a9a95e2671a4c306cfd37
font_01_sfnt_off000061de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 18476 bytes
SHA-256: dd1e9edcae6782c480dff53724a1580fadec54e6656b8ddfb273bcd699f2c343

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