Malicious PDF — malware analysis report

Static analysis result for SHA-256 209c63ce39bbfc0f…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 21:54:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 11421ed28abff25b53a20bcd4618c7a3 SHA-1: dd92d83f2298fc55fc08be849948df6f762919c4 SHA-256: 209c63ce39bbfc0fcfa5efe80373d8de71641e545ee9a98729fa8559b0535516
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious websites, masquerading as game hacks or generators. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-rewards-free-spins-game-hack. While no scripts were explicitly extracted, the presence of numerous malicious redirector links and the ML classifier's high confidence score indicate a high likelihood of this document being used for phishing or malware distribution.

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/406889139/coin-master-rewards-free-spins-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-hack-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/promo-code-roblox-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-make-a-hot-boy-character-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/win-free-robux-robux-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-game-tool-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hack-apk-ios_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pubg-uc-to-rm_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/dbfa-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-mr-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-twitter-bird-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pubg-uc-redeem_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-roblox-volar_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_off000030ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AB 22664 bytes
SHA-256: d022b1569155292ff9ea0ec6f241f3a7c1e0dd7d98100f480f71c12425621c3a
font_01_sfnt_off00006360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 18512 bytes
SHA-256: 6bc66a7c9124691c5dbe04e2c8d08202ba1ceeb7f14ff76ef8eff16a4b1fabf8

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