Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d22f7cb24dc7bf…

MALICIOUS

PDF

34.0 KB Created: 2021-06-29 01:45:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fdacae9305e1b0b5d63c6b331ade23cf SHA-1: 09d3aecaf754048b2c75e5078ae271efeb181999 SHA-256: 15d22f7cb24dc7bfe11fa3ad309b711b6cab386b6dc5995cc43c3aec3483609f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links and references to 'free Robux' and 'game hacks', indicating a lure to trick users into visiting malicious websites. The primary link, http://netcdn.co/app/431946152/free-robux-hack-forum-by-envix-game-hack, is directly associated with a high-severity heuristic firing for a game hack redirector. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/free-robux-hack-forum-by-envix-game-hack PDF link annotation
    • http://www.europeancamerata.com/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/roblox-admin-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/roblox-apk-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/give-me-robux-now_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
font_00_sfnt_off00002dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAB 21940 bytes
SHA-256: 64fa0daea700d387c4fe49f8373cdef1ba3b16019cc2ac4f423eed27d39f19b1
font_01_sfnt_off00005e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6A 19560 bytes
SHA-256: 17c481fa9126d6eb2b31ecc0f71ad4faf2ee7dcd4913f32ea95994c964ba8a8d

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