Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8d069fb2e02992…

MALICIOUS

PDF

43.9 KB Created: 2021-05-11 02:12:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa21a99a7c3d66bac09f50b437b65656 SHA-1: b398bb593712ad692c833d91f5d1700e309b53a9 SHA-256: bd8d069fb2e02992b938478589f80f6abc4c5cabd150d69e21b1fe21d118c84f
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/websites-to-get-free-robux-game-hack PDF link annotation
    • http://matweb.pl/images/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://matweb.pl/images/wurst-client_GM479516143.pdfIn PDF document text
    • http://matweb.pl/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://matweb.pl/images/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://matweb.pl/images/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://matweb.pl/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://matweb.pl/images/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://matweb.pl/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://matweb.pl/images/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://matweb.pl/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://matweb.pl/images/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://matweb.pl/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://matweb.pl/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://matweb.pl/images/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://matweb.pl/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://matweb.pl/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://matweb.pl/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://matweb.pl/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://matweb.pl/images/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://matweb.pl/images/where-to-get-free-robux_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_003_off000047b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B3 28904 bytes
SHA-256: 8a0e2d251e896c187e7d3cb903a423baa231f5bd36e48004a3fdc560f5ab191f
font_01_sfnt_off000088f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F4 18436 bytes
SHA-256: 6ab9ab31980840835fbaeca164a74f0e8188db39a6ce5c5e4face3e95ba0b523