Malicious PDF — malware analysis report

Static analysis result for SHA-256 1424c56281ca2a5b…

MALICIOUS

PDF

43.1 KB Created: 2021-05-19 05:38:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cec7c3d46d03ba1cd607866ae0682778 SHA-1: 2afea8e9ab7b427c032e1d34c0e03e8af8c8b552 SHA-256: 1424c56281ca2a5b27b5c7363348f4b046765bc70a9c04414ca095aa7175c438
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/roblox-free-body-game-hack PDF link annotation
    • http://eltisstudio.sk/images/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-robux-hack-generator_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_off000049a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A7 27244 bytes
SHA-256: 5a3520f5b2e25aa0b3a1624a2bd22fd60f2fddc9da3f3f1cc26e5e7db3495013
font_01_sfnt_off0000862f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862F 18300 bytes
SHA-256: 18afd95e8d4f71f33520678a0de9ae8deb20909ba5c2eba22890e369374f989b

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