Malicious PDF — malware analysis report

Static analysis result for SHA-256 247147e10c643e69…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 12:12:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4b7b310ff0c882bb1b777ec718e36d08 SHA-1: d41a13b028a8adb018c40dd5db69c61efca1663a SHA-256: 247147e10c643e692df938c0964fc1ec780c9a41f07a97cc8b7749b82ae9032c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as free game hacks and downloads. The primary redirector URL is http://netcdn.tw/app/479516143/minecraft-free-download-apk-softonic-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to lead users to potentially malicious sites, likely for further malware delivery or credential harvesting.

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/479516143/minecraft-free-download-apk-softonic-game-hack In PDF document text
    • https://sunnygarden.com.tw/image/data/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/only-robux-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/top-10-type-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-rewards_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/all-roblox-gamepass-free_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-mobile-24-com-roblox_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/robux-generator-for-free_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-minecraft-for-free-ios_GM479516143.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_off00003115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3115 22380 bytes
SHA-256: f24a7a7e797a30458a77e4f04ed44cc30d7bbe16afbf9d0312e50fef2ddeb125
font_01_sfnt_off00006237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6237 18924 bytes
SHA-256: aed929b1c7b3cb84e23d484bb8a36e156d71bfa58a7e5a6631ce24cfbc00e5cd

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