Malicious PDF — malware analysis report

Static analysis result for SHA-256 172af2bd16af75ed…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 11:48:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1ee426f03e0cd7f81c106b7d66657014 SHA-1: df9ffe8e5a7b7bae70ad900a7dbe2d11d3ca3327 SHA-256: 172af2bd16af75ed6090136e1c02eb0c7da6fd8b99119774a68ed96978f2aca9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as game hack generators. The primary lure appears to be related to Roblox, directing users to 'netcdn.online'. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious sites, likely for further payload delivery or phishing. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/roblox-apk-hack-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pubg-uc-generator-without-human-verification-2021_GM1330123889.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-money-cheat-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-viking-quest-hack_GM406889139.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_off00005318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5318 27788 bytes
SHA-256: f6e5df4ebb08e2c47222d356db690acea424c0e7806161b9c69c79f441b4cc24
font_01_sfnt_off000090fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90FE 18356 bytes
SHA-256: 7e836b6261bebb63fda2bc6c603fa398fe0a548bc6334e21915c3f4956160db8

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