Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be53b7fcd5863c0…

MALICIOUS

PDF

46.9 KB Created: 2021-06-11 09:17:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6b51662de8c6a78e5a43e487c2931758 SHA-1: 88136acdf29734637dc9bf5e6d13961c8b632913 SHA-256: 9be53b7fcd5863c0b64eec7709ea95d85861bc36a5591d26a4a3570b13a33b36
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-with-no-app-download-game-hack PDF link annotation
    • http://brokermortgages.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/free-robux-without-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-free-boombox-games_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-dupe-hack_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-minecraft-alts_GM479516143.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_off00004f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F6A 29636 bytes
SHA-256: ecf1bd8b86ebcf627483786217c9e17c18469634288c62babf732b2c2fc5d923
font_01_sfnt_off00009107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9107 19584 bytes
SHA-256: 5676d65303729c220dd12ff42f25b330c3fca4f922d6df97b66276be945f201a

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