Malicious PDF — malware analysis report

Static analysis result for SHA-256 41bc881aa3019509…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 02:23:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bb2d5c43b619470b8d95f0f0c975627d SHA-1: 05094310ed640782a46773847313607f51857efb SHA-256: 41bc881aa3019509ca4be1c229ee858d53d035e4cec26ea14ebfdb917e0a9cdd
82 Risk Score

Malware Insights

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

This PDF document contains multiple links, with a primary URL pointing to a 'coin-master-free-spins-coins-game-hack' page. The presence of a high-severity heuristic for game hack lures and the ML classifier's strong indication of maliciousness suggest this document is designed to trick users into visiting potentially harmful sites. The document body and embedded URLs reinforce the theme of game cheats and hacks, indicating a social engineering tactic to drive traffic to malicious or scam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-free-spins-coins-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/cinnamon-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/black-t-shirt-free-roblox-tshirt_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-buff-body_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-hack-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-hack-on-pc-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-group-funds-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_off000030e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E0 22852 bytes
SHA-256: 18b7fe81f9a5fa0834f661caeacc2714dd660040f030275099db7b99ea64cf95
font_01_sfnt_off00006411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6411 18176 bytes
SHA-256: c90cd52c690b3b1dd04b69356ad4f8db221968fb130a3d2ff71dcd50323a1a90

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