Malicious PDF — malware analysis report

Static analysis result for SHA-256 506c828147dd43b3…

MALICIOUS

PDF

48.2 KB Created: 2021-06-09 10:24:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9165908339049a9f5a01a4b1bde897af SHA-1: 30fed10d37909d922e6b3e41284ee302a3941cba SHA-256: 506c828147dd43b3d0c1afbe172a3ece452a17c0a3d947d9399b1be132237a48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/hacks-para-roblox-2021-booga-booga-game-hack, which is designed to trick users into downloading potentially harmful content. The document body and embedded URLs suggest a social engineering tactic to exploit interest in online games and virtual currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 https://netcdn.tw/app/431946152/hacks-para-roblox-2021-booga-booga-game-hack In PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-today-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-cheat-dll-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-hack-mining-simulator-rebhirt_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/wurst_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/tiktok-free-like-website_GM835599320.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/real-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-roblox-clothes-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-easy-on-phone_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_off000052c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52C4 28604 bytes
SHA-256: 93c80142270e18b82c24427f158a6d3494d83f8cd5b9258200cb7b5c7b09b340
font_01_sfnt_off000097b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B0 19024 bytes
SHA-256: 2577977cb3710d65a2b16ed21122a2ec494c2b3693a0f6eb597260ffcb739c8f

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