Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53dec5b81c59085…

MALICIOUS

PDF

34.3 KB Created: 2021-06-22 11:24:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fd2a87e903942e80db2f2e8070c985be SHA-1: 7e4eb6f3d0998aa325e9e455541dc1c7b64b43d2 SHA-256: c53dec5b81c59085049d8664e8ead968ecec0c135f6c73768bddb95746cf48c7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free in-game currency, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of game-related lures suggests a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URLs point towards a social engineering attack.

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/how-to-get-free-admin-comands-on-roblox-game-hack PDF link annotation
    • https://vieclamjapan.com/upload/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-100-percent-real_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-can-i-get-free-robux-for-friends_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-free-level-7-exploit-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-free-like-bots_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-roblox-toy-codes-november-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-rewards-free-spins_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_off00003097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3097 21488 bytes
SHA-256: 76c152d7ba31b867063f2b316e479fcc18c62b714d99363c01a46eeed711b370
font_01_sfnt_off00005fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB1 19472 bytes
SHA-256: d7d5c0c78f7aa7211826fb1bd7c854e0d06ad6876863eb7030b8e0ec19afc842

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