Malicious PDF — malware analysis report

Static analysis result for SHA-256 f463047e6ee4dbef…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 09:38:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 08b92bd8450c62372ab0481dedb8f955 SHA-1: 04082a80de47d117e00f6325a0a2bc4a8572878f SHA-256: f463047e6ee4dbefab332ac6919d378d3c970284d5bae8081d60f82ac0ab3330
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary link identified as a malicious redirector. This redirector is associated with lures for game hacks and free currency, suggesting a phishing or scam attempt. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the embedded URLs and the nature of the lure indicate a malicious intent to redirect users to potentially harmful sites.

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.tw/app/431946152/how-to-get-free-robux-for-free-game-hack In PDF document text
    • http://library.acehresearch.org/repository/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-groups-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/noob-pants-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-t-shirt-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-2021-unlimited-codes-for-kids_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/developer-console-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/cheat-engine-64-roblox-noclip_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-fly-hack-in-roblox-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-my-roblox-account-freee-no-downloads_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/dll-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-how-to-get-free-robux-promo-code_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-hack-not-patch_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_off00002fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBF 21800 bytes
SHA-256: 04dc86e1df33c0ede1408568884f48214899fba3f64376083b776ff10deb7bde
font_01_sfnt_off00005f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9A 18984 bytes
SHA-256: b02f235e187ca63825268846ce24859b9c73d6f06522f0e44481555b58ecada8

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