Malicious PDF — malware analysis report

Static analysis result for SHA-256 691eef6ee585fa18…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 12:56:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: beafdcc5db75ae1863a5873f17a971e1 SHA-1: 7c077e9aa2d0a12c912734d859d4bf467b0e003c SHA-256: 691eef6ee585fa18aba44556666142a1c985d2eaffd27df2a234442886205c1d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high-confidence heuristic indicating it's a lure for game hacks or generators, directing users to a suspicious URL. The document body and embedded URLs reinforce this lure, suggesting an attempt to trick users into visiting a potentially malicious site. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.online/app/406889139/rare-free-links-to-coin-master-game-hack PDF link annotation
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/login-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/rbx-com_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ea1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA1 25816 bytes
SHA-256: 7ffc8e710dcff636dc53e1847c858607a9208c5e10b88f75fb992d2b45982967
font_01_sfnt_off000089ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EE 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off00009511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9511 17880 bytes
SHA-256: 52bfad4f4c19f81cbdb35045d00ab5f214a6d1a7ce3c9e0998cef8a9f07687f9

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