Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be7925fcfef4d0b…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 17:55:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0d5dccd7f34aa2c9d431d0634e5150ba SHA-1: 6f54dfebd6ff21521f73cfd485d43d69a80aab0f SHA-256: 3be7925fcfef4d0b981b948ced400cee5f28cfd83c6e89d20b1faa04b9407366
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of 'free generator' or 'game hack' content. The primary link, http://netcdn.tw/app/431946152/how-to-get-free-clothes-on-roblox-game-hack, is identified as a malicious redirector. This suggests the document's purpose is to trick users into visiting these sites, likely to download further malicious payloads or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.tw/app/431946152/how-to-get-free-clothes-on-roblox-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-make-your-own-game-whith-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-generator-fresh-update-5032021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/todos-los-hacks-de-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/code-roblox-tokyo-ghoul-2021-free-rc_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-mow-my-lawn-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/20210-robux-code-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-cheat-engine-lua-gui-scripts_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/first-time-builders-club-roblox-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-robloxlover_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-a-lot-of-robux_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_off00002f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3A 21760 bytes
SHA-256: 3afce12f3a7a19067bc46d70c03da2a6f644c3652a3c3c45a58ff375f85ae02f
font_01_sfnt_off00005f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F46 19084 bytes
SHA-256: 2902f4667b61099e52994da4e28254f282222ccc975eab356b3cfa2df705f850

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