Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac315bc16b4b88e…

MALICIOUS

PDF

35.2 KB Created: 2021-07-01 07:53:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 11e48a72f5459ad7795dda1d7d71e7a8 SHA-1: 54458bcc5d2ec3a2103a7c64c6107fd7d1bef7c2 SHA-256: 2ac315bc16b4b88e6e26abab88f7869fcec740aa1c87a31dda3fb7d5df13a46e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs related to game hacks and free in-game currency. The primary URL, http://netcdn.co/app/431946152/azurewrath-hack-roblox-game-hack, is identified as a redirector for a game hack lure. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and linked content strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/azurewrath-hack-roblox-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-struicid-stop-start-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/xdaniel-hack-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-robux-hack-yourself_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-apk-download_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_off00002fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAE 23016 bytes
SHA-256: 6ac2b27ec09363945a72a1eba9330e54f8d0866b11427db16da12596be6d1272
font_01_sfnt_off0000637c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637C 19312 bytes
SHA-256: e58318baf2601e9eab4c2a8e9ae635c65ca4300cca473761e7eb73eda4ea80b2

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