Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e11db9e8a081f1…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 12:22:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 071a0ed335c76b5a5889eba17b7b1abd SHA-1: 0ba6880385a6aa5b8b818a4b20058309bf6f081d SHA-256: 23e11db9e8a081f128675d9d232b984f9477ed36c811eaf0d34f507b2d5f7581
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to obtaining free Robux and game hacks, directing users to malicious URLs. The ML classifier strongly indicated maliciousness, and the presence of multiple game-related lures reinforces this. Although no scripts were explicitly extracted, the PDF structure itself contains embedded URIs that are likely intended to lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/431946152/how-to-get-free-robux-no-verification-2021-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-100-spin-hack_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_off00004f4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4B 25856 bytes
SHA-256: 0bd48f8de38303afe54189c670b15d2237f9103a9baeffb65c20e7fc716d9d00
font_01_sfnt_off00008b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B96 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9581 19164 bytes
SHA-256: 96effbdae210045e90f33644c7199b62eda4c51e6e40441412be2e574896d09f

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