Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a88fcf896a74ed…

MALICIOUS

PDF

47.9 KB Created: 2021-05-15 09:03:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f562d4e81f9e2326e5dc42989381c685 SHA-1: 0bf8ea4869bd1bad3127172c56156a7a663b7b82 SHA-256: 25a88fcf896a74ed5ee9a0cc91d56b2ced974f1f888e80542afe2a0c9271657d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, such as 'Roblox Hack App'. The heuristic firings indicate that the PDF is designed to redirect users to malicious infrastructure. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification suggest a high likelihood of a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.xyz/app/431946152/roblox-hack-app-game-hack In PDF document text
    • http://axiapublishers.com/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/roblox-com-www_GM431946152.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
font_00_sfnt_off00004b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B02 29560 bytes
SHA-256: 3e2b8d7b9c7192df0f4e4249674b57cbe7aebbef6b0a805b0b5443ed4d5d5b47
font_01_sfnt_off00008ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE4 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off00009878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9878 18356 bytes
SHA-256: 7cdc4109e76722f5b523df4cd1b295e2212ddbe91aca110ba626f8c95e058f26

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