Malicious PDF — malware analysis report

Static analysis result for SHA-256 624d13d3cbc307f9…

MALICIOUS

PDF

43.4 KB Created: 2021-05-19 17:18:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 23adf04364c2510677c4e85fc5293c4b SHA-1: 2b546c1791577e87bff8399e3b92fda15c71225a SHA-256: 624d13d3cbc307f975aaa63d751ef1c515e0396f15399908ad9b8e2782a1642d
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 0.9969

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.xyz/app/431946152/free-robux-com-no-verification-game-hack PDF link annotation
    • https://schulzpressetext.de/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/daily-free-spins-coin-master-heaven_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
stream_003_off00004a08.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A08 26372 bytes
SHA-256: a52a85bcad6be37ed3ee1f1a3f00338e2195825fb0928104f5f1050b37035759
font_01_sfnt_off0000859a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859A 18860 bytes
SHA-256: fd9d837b898dacd9f5ea22edfb03c528ade61200bf0a18b53858ad02fb024854

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