Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd0d9bcbce9b619…

MALICIOUS

PDF

32.5 KB Created: 2021-07-03 23:21:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3397f56f8bf178cc4f723a7098b2cc28 SHA-1: 8dd4031e3619732ee8b4dbf6a5d0ed17c928155d SHA-256: 3fd0d9bcbce9b6192d4a24408927e76076c113ebf16b606bd9909f1cc062e7a4
220 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free currency, specifically targeting Roblox and Coin Master. It contains numerous links to external PDFs and a primary redirector URL, indicating a phishing or scam attempt. The document's structure and embedded links strongly suggest it is designed to lead users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-catalog-free-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/r7-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-studio-free-download-for-windows_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cheat-engine-lua-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-sjywars-servers-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/3-games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-fly-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-intsall-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/spare-api-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-codes-generaator-roblox-no-fake-no-verication-human_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/gifting-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/rewardrobux-com_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_off000029b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29B6 22220 bytes
SHA-256: d86c504be98f50598f9a40a39b5750212b0e88469a78b09bdae58efa747f0d1d
font_01_sfnt_off00005b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B22 18752 bytes
SHA-256: a176fedfdd02b133d57120f96d854ce18c82b68e764468af89c6bae8c4c99442

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