Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3280ef36a3ceb0…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 22:25:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c35fa0b60f339b7fd9a4076afd212d75 SHA-1: 437586cb46930f36f70f4e3aff40e49f97e0c2ad SHA-256: 9f3280ef36a3ceb0c80d71934703ae59dfef7b79c7dd949e01df1dab674721a2
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 'game hacks' and 'free spins'. The primary lure appears to be a 'free generator / game hack' which leads to the URL http://netcdn.tw/app/479516143/cool-minecraft-hacks-game-hack. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful sites.

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/cool-minecraft-hacks-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-no-hack-or-cheat-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-explorer-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-gift-card-codes-that-work_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-to-play-roblox-video_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/pastebin-hack-account-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-for-rubux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-hack-free-skins_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/what-is-exploiting-in-roblox_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_off00003004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3004 22284 bytes
SHA-256: 2e66b9044eca443e3b886ba50a16ed1e5b56dae8f8deaa0e3fb934ed96fa0e4e
font_01_sfnt_off000061a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A2 18240 bytes
SHA-256: 1c98bc36042c0615650adcd4002099b1bf58f46cf651dff08176303f69938fe5

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