Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a9fac216671fac…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 16:24:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9982c86b1df8a41ca395b15f02f527ec SHA-1: cf7d66f8463eb1a35198026167802617ac8fd901 SHA-256: 17a9fac216671face9e127fec8d097867368d004cea211e2c4492170bb40619f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to known malicious redirectors and lures users with the promise of game hacks. The primary link, http://netcdn.tw/app/479516143/download-minecraft-bedrock-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into downloading potentially harmful content.

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/download-minecraft-bedrock-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-shirt-and-pants-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hyperbike-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-for-flying_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-icon_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/irobux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/pet-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-roblox-2021-september_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/best-site-for-free-coin-master-free-spins_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_off00003198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3198 22108 bytes
SHA-256: 5992b70cd2fc3c839148e00f35509172f8c975d5418b5710a6f61d12ddd8c9d5
font_01_sfnt_off000062ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AC 18964 bytes
SHA-256: d365ba070fe6fd3fa6ed3fff7f0487a6e267f0f297f09f268bd410be9b6223ff

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