Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9b165541876861…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 18:58:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 003988337838b17d302876db214aa2b3 SHA-1: 80ecb0f59af933ce1dfe4dacfeb68a8a8804f0c2 SHA-256: aa9b16554187686170e5f8d4ca1fb674bcf1e7be78495fb281ac676347d53cab
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites that offer game hacks and cheats, such as 'free-minecraft-realms-to-join-game-hack'. The presence of these lures, combined with a high-confidence ML classifier flagging the PDF as malicious, indicates a phishing or social engineering attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a lure for malware download or credential harvesting.

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/479516143/free-minecraft-realms-to-join-game-hack PDF link annotation
    • http://lib.mbp.ac.id/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-robux-free-sin-pastebin-2021-con-jugar_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-rixty-code-hack-march-2021-updated_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-robux-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-adidas-pants-free_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-coin-master-spin-app_GM406889139.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_off00003148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3148 22436 bytes
SHA-256: d83730f3e6d2deb662a47e45fdb2db4fb97ebba3713f4d3a6a9a95afe159e79d
font_01_sfnt_off0000632b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 18500 bytes
SHA-256: 19b6feb9acee4cfe56e66fbcc94b4fdf30cbdc0dfbc0c206c9cfcba5957af8e0

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