Malicious PDF — malware analysis report

Static analysis result for SHA-256 95235fbd0e8f83f8…

MALICIOUS

PDF

44.4 KB Created: 2021-05-14 21:08:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 582fdffb8dfa27324234531f4a7facdd SHA-1: fcf81a74242eed58e60bc8ed89aeff48af6c5b0c SHA-256: 95235fbd0e8f83f8c9e776f65a8875931d6e654a25a81005250b515d2a5cd350
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector link associated with game hacks and free generators, specifically pointing to 'free-spin-today-coin-master-game-hack'. The document body, though partially corrupted, also contains this URL and other similar URLs hosted on what appears to be a compromised domain. This suggests a phishing or scam attempt designed to lead users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/free-spin-today-coin-master-game-hack In PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004777.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4777 25112 bytes
SHA-256: 81232297604e214e5aa7650800476c6ecf07a82ea6b26f970cd4b2e628a9cf0d
font_01_sfnt_off000080fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FC 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE7 18240 bytes
SHA-256: 78c04cb83b3c312ccbbb37a13dd02ec2cfa8937d686ae670a5893e360fd0758d

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