Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aca37dd2cbfadd8…

MALICIOUS

PDF

43.8 KB Created: 2021-05-15 01:32:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8f396289e7e9d9b110dc8ebfdb5d5bb8 SHA-1: 994ada2c65ee1066054746b507d61f0772d1ac90 SHA-256: 9aca37dd2cbfadd8bfb8d00a5df1143c492b071137097624a6f237ec32cf5680
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/is-there-any-way-to-get-free-robux-game-hack PDF link annotation
    • http://tileworld.com.au/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/original-roblox_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-no-human-verification-or-survey-2021_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_off00004b3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3F 25668 bytes
SHA-256: 907aa2fee0c1a1ee9b5bfa32f6583e9e1a82d433950ec5931cd59f0ab1475af1
font_01_sfnt_off0000872a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872A 18892 bytes
SHA-256: d4b621edf5ac5f073c5a65dd804db4f1f2ad13c123c1b5ace541ce5f5c284f58

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