Malicious PDF — malware analysis report

Static analysis result for SHA-256 be15aa274db2b3e3…

MALICIOUS

PDF

33.9 KB Created: 2021-06-25 16:17:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 55306fedf86148380525d53941668377 SHA-1: d1d4f09f2d6d2d87fd730e79c4aebe9bc550743e SHA-256: be15aa274db2b3e3c2d27bd16fa50b2354ac1683626693cd02172384cd4205a7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, directing users to a suspicious URL. The document body and embedded URLs reinforce this lure, suggesting the primary goal is to trick users into visiting a site that likely hosts malware or phishing content. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/saibling-roblox-hack-client-game-hack PDF link annotation
    • https://www.iosas.info/uploaded_files/userfiles/files/80-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/pubg-uc-or-pc_GM1330123889.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-all-packages-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/hacks-electric-state-roblox_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/tiktok-free-open_GM835599320.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-spins-coin-master-april-2021_GM406889139.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
font_00_sfnt_off00003092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3092 21660 bytes
SHA-256: 01399b36c576e5e9dae3be68a3caef7035818ae2b72e1e4417bb7a584b1540d5
font_01_sfnt_off00005ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF7 18880 bytes
SHA-256: 19a8c62d0bdac157de8ae541ba7c30c3e6338c7413f3aa33ddd7b2a4e8267fa5

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