Malicious PDF — malware analysis report

Static analysis result for SHA-256 67066d7c0d4fb48b…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 14:33:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 76b5000ad14c180c90d807d7cc18f5b8 SHA-1: 3661ca7bb0337c901a069a52e6be9e15ce6bd62c SHA-256: 67066d7c0d4fb48b3826538c0d88369c4dd3817d166e1ccedeef633845313f24
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links that redirect to known malicious infrastructure, specifically promoting game hacks and free currency. The primary link, http://netcdn.tw/app/431946152/roblox-free-robux-codes-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce the lure of obtaining free items for games like Roblox, a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of malicious redirectors and the lure suggest a phishing or potentially a downloader attack pattern.

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/roblox-free-robux-codes-game-hack In PDF document text
    • https://www.dahu-villa.com.tw/upload/files/esopera-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-roblox-no-surveys-or-download_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/how-do-we-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-robux-for-android-2021_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/hack-your-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/what-is-the-speed-hack-code-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/roblox-free-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/soda-crush-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/knife-server-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/or-sur-roblox-tower-battles-cheat_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/robux-generator-unlimited-hacks_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_off00002ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDB 22572 bytes
SHA-256: d671da4ac2570ec0ccaf1a0d9208a57ffca5a7e760e6336a5d50f52e747fb503
font_01_sfnt_off00006027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6027 18964 bytes
SHA-256: a55805342354896b15de53c372ce6b4f67675692ecef428388acdddaf3dfd905