Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58dd5642ce0a165…

MALICIOUS

PDF

34.2 KB Created: 2021-06-25 07:02:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a00a0e2b8b6cb885a9599bd193a9abbc SHA-1: 5f1bf9acd1c00d7ef2495adc8fdfe392fcd73ada SHA-256: d58dd5642ce0a1651834dbcb8857478dfaf9d230b5eea03194e4c748124c4754
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/robux-gratis-sin-hacks-2021-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising free game-related items or hacks. The ML classifier also strongly indicated maliciousness.

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/robux-gratis-sin-hacks-2021-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-catalog-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-roblox-copy-any-roblox-game_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-offer-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/commen-avoir-robux-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/speed-hack-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-robux-codes_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-grab-the-child-hacks_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-someones-roblox-account-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/tiktok-free-like-website_GM835599320.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-para-roblox-facil-youtube_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-link-today_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_off00002ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF1 21988 bytes
SHA-256: b46da3b1132ca8a24eeecc8a208c5dfd08c277b107262cfcb24e2bcbb60b1ba4
font_01_sfnt_off00005f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F57 19348 bytes
SHA-256: 7d80ae536730ecd9bbcf0bb7fe2e0d4f7568b1adac9686eddaa32ab580822396