Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e69a75e03a22aab…

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 14:52:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: acf0eccd7d5c869fa72d2870c46265f5 SHA-1: 0edcf35fce44d5b64dc60b22268de8faed827d5e SHA-256: 5e69a75e03a22aabb286ecbb2f954c9feea0af9f6554e44592740d755d31f399
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-rthro-roblox-game-hack. This lure is designed to trick users into believing they can obtain game hacks or generators. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of multiple malicious links suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/free-rthro-roblox-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-1m_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-free-no-download-or-sign-up_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/hack-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-tycoon-money-hack-no-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-hack-and-get-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/tiny-tanks-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-faces-that-cost-robux-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-fast-and-easy-2021_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
font_00_sfnt_off000033c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C5 22520 bytes
SHA-256: 344a615b571e297ae1c69597878b51a68f49c4064067900aa861e11539125360
font_01_sfnt_off00006617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6617 18920 bytes
SHA-256: 43cf3bd67f1f9c25a0007a3fa952637feda465a4e8537af52a65779cf39311dd

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