Malicious PDF — malware analysis report

Static analysis result for SHA-256 950d4bd58c91238d…

MALICIOUS

PDF

44.5 KB Created: 2021-05-14 07:32:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 285ddbf36dfe058dbb7649c97461502b SHA-1: cd850daaf954184bfd00374a7465fab4e7caf158 SHA-256: 950d4bd58c91238d23d82d0f3e790f4873de6957b9bb9265d3327af9cfc9dbf0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to game hacks and generators, directing users to external URLs. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to redirect users to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/479516143/how-to-hack-minecraft-pe-game-hack PDF link annotation
    • http://nationshield.ae/userfiles/files/robux-miner_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a15.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A15 25076 bytes
SHA-256: 5ea32190e9e04a9d4a9baa7eed68f270432def2c165aef339ce149da345839a5
font_01_sfnt_off00008211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8211 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00008bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB8 18196 bytes
SHA-256: d34ad1dbd9dd4a0600043f837e3a6c6fdafb13b781254d1b565cb7d4b46c75dd

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