Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4d4c88d013de36…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 08:11:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7c5e596b934d42908b9afa9e9f7d523c SHA-1: 713701544ae51bacda4799c25826821786c2d60c SHA-256: 0e4d4c88d013de360299e39640eade7cb280f6805893f0845258dc6e02b7d950
160 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a lure for game hacks and redirects users to a known malicious infrastructure. The document body, though heavily obfuscated, contains references to 'free robux' and a URL that aligns with the heuristic findings. The ML classifier also strongly flagged this PDF as malicious.

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/free-robux-obby-game-hack In PDF document text
    • https://www.planetzoe.hr/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-robux-scam-place-download_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://planetzoe.hr/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/roblox-hack-mod-apk-2021_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/free-robux-codes-2021-june_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-robux-gift-card-codes-2021-feb_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/infinite-robux_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/i-robux_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/free-likes-and-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://planetzoe.hr/files/how-to-get-free-robux-on-iphone-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-to-get-any-item-free-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://www.planetzoe.hr/files/coin-master-free-spins-link-2021_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_off00002f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F25 23020 bytes
SHA-256: 1c3b7388bdb317252c2f3d8697f8dd0e102221ba8a8bfdc73991c2cfe0da0ccb
font_01_sfnt_off00006312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 18896 bytes
SHA-256: 6e9f00f662c7d21a362c6f4977b25baee64ea5d1b6302ee915ad89b263504de8

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