Malicious PDF — malware analysis report

Static analysis result for SHA-256 5333ec0bc204dec1…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 04:51:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f6dbe869459be5e442402903076928ad SHA-1: 7af418c52e1b1bfb1cf639b11dbc442a143c2af5 SHA-256: 5333ec0bc204dec1c47896a6c9cf19b525f010dba21d18182936763f35de6338
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that lead to known malicious redirectors and lures for game hacks and free currency. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-jailbreak-hack-2021-new-game-hack, which is designed to trick users into downloading further malicious content. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or malware distribution attempt.

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/431946152/roblox-jailbreak-hack-2021-new-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free4now-info-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-free-catalog-items-list_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-high-jump-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-description_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-gainer-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-cards-2021-codes_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-no-scope-sniping-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off000032ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32CA 22744 bytes
SHA-256: 70c344ee5a476d3431c2f0d5db505a4bf63972f92a3167661f809401bd41ae36
font_01_sfnt_off000065e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E8 19320 bytes
SHA-256: 52b661b7df7135501daafa4d43a4d112b48bb230202696612c43d9dd4eb13d88

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