Malicious PDF — malware analysis report

Static analysis result for SHA-256 023bb3a57b8a20f7…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 09:11:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1891b3794384cd025182f1d910ed039e SHA-1: 5ec7595b29911ea6fdc09317e67d2b2cbda79ee7 SHA-256: 023bb3a57b8a20f781d78d99d4b9ba31b5600822c3a960a58e45a12d3b3bc039
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary malicious URL identified is https://netcdn.online/app/406889139/free-coin-master-spins-game-hack. The document's structure and embedded links strongly suggest a phishing or scam attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/free-coin-master-spins-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-admin-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-shirts-templates_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
stream_004_off0000523d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x523D 24656 bytes
SHA-256: 81a63e5173a3b9c65345810b7cc3c8721709012969a43a1cb75311cfd701d41b
font_01_sfnt_off00008a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A73 17884 bytes
SHA-256: dbba0adc3b1b7bb8b2e5e51fec5d28ab169e2f7a165ed2a14d616932af559aea

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