Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ba793124dc33c3…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 19:14:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2681f8703bf995f2496abb70c482a9df SHA-1: 011a180842e20c1c01a37a96420c747dbc744b4a SHA-256: 46ba793124dc33c303a0238ac428d5f4643551657a3d88ea087f84a04a2efc28
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 generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/431946152/how-do-i-get-free-robux-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a phishing or scam attempt to trick users into visiting these malicious sites, likely to download further malware or steal credentials.

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-do-i-get-free-robux-game-hack In PDF document text
    • https://www.ruchya.com.tw/upload/files/free-roblox-youtubers-accounts-with-passwords-2021_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/flob-fun-roblox-hacker-generator_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/pubg-uc-website-india_GM1330123889.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/vehicle-stereo-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/robux-sign_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/getbux-win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-roblox-accounts-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/roblox-jailbreak-hack-2021-new_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/roblox-how-to-get-gamepasses-for-free_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/make-robux-free_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-website-real-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/rbxfreecom-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/e-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-kohls-admin-roblox_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-spins-for-coin-master-that-work_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_off000031eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EB 22904 bytes
SHA-256: 42aab186dfe74ae1c3d0de0fe388a78acdbc294cc68363cfab43b4327ea6ee53
font_01_sfnt_off000064e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 19152 bytes
SHA-256: dbadd7ca2f39853e1d628412f433763acd544662f92d7d1ac8e48e35ccd177e9

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