Malicious PDF — malware analysis report

Static analysis result for SHA-256 05481ef83b7da6ca…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 06:07:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8a19c9a5fcf17f899c3dd7ae51b0e503 SHA-1: bffb9e4ac822b35a50e98126402b90585ac53878 SHA-256: 05481ef83b7da6ca5b5d7a1a22c20517789a888fed31a04d23ef87f862e39b06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, specifically promoting 'game hacks' and 'generators'. The ML classifier also flagged this PDF with high confidence. The primary lure appears to be related to online games like Roblox and Minecraft, aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/rbxdemon-game-hack In PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/make-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E77 26196 bytes
SHA-256: 34f4c8eac0ae948de71d4e6ec7dd52f5786d589d9a12b5aa6bff5f73e397d723
font_01_sfnt_off000088e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E3 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000958a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x958A 18144 bytes
SHA-256: 84e994ea3e0766e4b6b44f1efc08852f1b1b6721f581ba32b946cb803bfb180d

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