Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0bb85d84916c313…

MALICIOUS

PDF

35.8 KB Created: 2021-06-18 06:22:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c4a7e38385bf41a927251ad302824a0e SHA-1: 662a25f7aaefb1e3f979533ca4331d5cef1f0f88 SHA-256: f0bb85d84916c313dbad167234ab9dc4cd0e72a1eb6e762063457b2c4ae67cf1
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users to external sites, including a known malicious redirector. The document body and heuristics indicate a scam related to game hacks and generators, likely intended to trick users into downloading further malware or visiting malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/hacks-for-roblox-the-purge-game-hack In PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-no-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-clicker_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-mac-os-x-free-download_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/master-coin-free-spin_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_off00003434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3434 22700 bytes
SHA-256: 0cbcd3a6a01c10104a8a70e673ecc9d54c72975bc751794a9429ce28188472bb
font_01_sfnt_off0000668f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668F 19280 bytes
SHA-256: 5016b87e0fced68efe05a058773e9ab5caa7ae22ef7b5f69e45dcc456ad6cdb7

Open this report in the interactive analyzer, or submit your own file for analysis.