Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce9f5d6a2aa0fad…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 02:40:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a470bebd694d09f39ca1b6fb306f0a58 SHA-1: ce1386f15efbacc6e64baada8a3fa3a6ce7ee497 SHA-256: 8ce9f5d6a2aa0fad9716749026e6bcbcb8516146c0248274b9ef1cc474c69a07
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/best-free-minecraft-servers-game-hack. This lure is presented as a 'free generator / game hack', indicating a social engineering tactic to trick users into visiting potentially harmful sites. The presence of a visual download button further supports the lure-based 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/479516143/best-free-minecraft-servers-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/robux-hack-dot-net_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-free-animatins_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/pubg-uc-200_GM1330123889.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-delivery-hack-bloxburg_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-background-2021-its-free_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/fps-hacks-roblox-aimbot-not-pf_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hacker-pants_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/efree-robux-hack-toold_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/pant-free-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/robux-and-tix-hack-v-7_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-twisted-murderer-mvp-hack_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/tradelands-roblox-cheats-see-in-dark_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-free-50-robux_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_off00003384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3384 22204 bytes
SHA-256: 2903f98caf774feb48fcbf38047cb4654012e6f32427dafb82f543b93263cedf
font_01_sfnt_off0000648a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648A 18188 bytes
SHA-256: 690aa9f6e393aebb2e451ae7360f2334a153522b180a230b3d87e49d6c6f2140

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