Malicious PDF — malware analysis report

Static analysis result for SHA-256 f351b86d60246820…

MALICIOUS

PDF

49.1 KB Created: 2021-06-11 12:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 10b696df812c89235b1b1d6562126699 SHA-1: da7c2a4f0f9d3d27d398186126dd08cbf01d5b16 SHA-256: f351b86d6024682011ea9e9bda456fb5890ae9af7019ac79f3b5702b4221968e
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 0.9796

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.tw/app/431946152/free-games-at-roblox-com-browser-game-hack PDF link annotation
    • http://perpus.polimarim.online/repository/camping-roblox-game-how-to-get-free-items_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/10-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/tiktok-free-views-website_GM835599320.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-robux-clickbait_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-free-play-guest_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/name-that-character-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-unlimited-spins_GM406889139.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_004_off00004fd5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD5 27800 bytes
SHA-256: 1f2f29c61a7843926c48cdd3113b4bf236934a2276e96826f6fad4023459bd70
font_01_sfnt_off00009012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9012 3564 bytes
SHA-256: 15deed6ed724e43d978cc0d79099385f08014ad9bd80d801638e0da8ae80196a
font_02_sfnt_off00009bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEA 18704 bytes
SHA-256: 26f3f9e8481502a5865b4bdc5eab720efff01cbbb3a57be64addb84d79ccca48

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