Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5de5c02137e0f8e…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 08:55:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7acd0756e4cca8fc723e8b95a940a6bb SHA-1: c09d8dfed3af09f8c82f42df1f21b72fab204666 SHA-256: e5de5c02137e0f8e7bb8dd0bbcd2c422f64e6edfbe8af6c86219c5e4795a6ff9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for free game currency or hacks, directing users to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The embedded URL is designed to trick users into visiting a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/how-do-you-get-free-robux-2021-game-hack In PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/getrobux-ninja_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/pokemon-go-free-kanto-tour_GM1094591345.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-spin-coin-master-new-link_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_off00005092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5092 25188 bytes
SHA-256: 42d4decda05e2eaaf2189c366b221731ed5bd25df6615b4da98e0dd6316b64b5
font_01_sfnt_off00008ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE6 19016 bytes
SHA-256: 7afc4835c6f8d200a546e15f78f642ba5dd88c8fac7df04bc3003dd1e9f7232a

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