Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f6f8e20d2c656e…

MALICIOUS

PDF

36.2 KB Created: 2021-07-01 08:25:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: da77b0f0fc3a1cc3f590be53571c8cf1 SHA-1: b0044cf9287364322258c6bc08b0858fbf764118 SHA-256: a9f6f8e20d2c656e628bb2b048de451bf60e386c42c9e2a42c488f32e62ba359
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on a 'free generator / game hack'. The primary link redirects to malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also flagged this document with high confidence. No scripts were extracted, but the document's structure and embedded URLs strongly suggest 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.co/app/431946152/roblox-for-free-no-signing-up-geust-game-hack In PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/robux-gainer_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-hack-a-roblox-account-using-command-prompt_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/https-webrobloxcom-games-2021202119-freeadmin-play-this-game-friends_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/rbxdemon_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-hack-de-robux_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_off00003392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3392 23160 bytes
SHA-256: 6158c2ff6ea1038d02f57b8c38536cd75fd9ce0ff50b8bf77de076d594a1843d
font_01_sfnt_off00006829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6829 19192 bytes
SHA-256: 7eb1e7c123ae68ddaa5df93f54cfcf3ba2346318f7624bb47c6154af9ed5d588

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