Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c30b9fb17b58df…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 09:15:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 879d5f5cfcb68b9cc4bdedf9cdce68eb SHA-1: 22ffa78d133b2f8595e91d8c200475071b38794a SHA-256: e6c30b9fb17b58dfc7cfd4e4787ee84a4a89a73a25d8fcc00ea95a1472098ca3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary URL identified is http://netcdn.tw/app/431946152/how-to-get-robux-for-free-2021-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF's structure and embedded links strongly indicate a phishing or scam attempt.

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-robux-for-free-2021-game-hack In PDF document text
    • https://sunnygarden.com.tw/image/data/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/b-tool-hack-in-roblox-link_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/cheats-to-get-money-on-roblox-woodson_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/basketball-free-charactes-in-roblox_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/the-real-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-real-without-email-needed_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-tuto-hack_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/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-dr-benx-hacken_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-use-wurst_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_off00002dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCC 22616 bytes
SHA-256: 11a509f780c596ec9388a981cedfa42e9f10fb6c374d00519eb7879adef71b7a
font_01_sfnt_off00006056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 19384 bytes
SHA-256: de28a66561f48ef455a7e74c3d38ef737581a70ecb9f32033b07134a01356d69

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