Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf82be64c32ccf1…

MALICIOUS

PDF

44.8 KB Created: 2021-06-10 18:08:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 67f3267d2f475e4aa3dcd5ecfec84bb8 SHA-1: e5ec6573996bf8bf9856bc6e68061602d87d34ba SHA-256: 3bf82be64c32ccf19831e6b0ae63fbd1936ec82fd65588407c26353ca6a4b69b
182 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are SEO-optimized PDFs related to game hacks and free currency. The document body and heuristics indicate a lure for game-related exploits, and the presence of a clipboard command lure suggests an attempt to trick the user into executing commands. While no scripts were directly extracted, the overall pattern points to a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://netcdn.tw/app/431946152/2021-roblox-hack-website-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-18_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-game-creation-code_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/what-is-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-use-hacks-on-roblox-after-injection_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/no-scam-free-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
stream_004_off00004f9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F9C 25148 bytes
SHA-256: 54866d2c99c2003b97a58f58c785c998a413c3b20e2b36a72d4714d01f590292
font_01_sfnt_off000089ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EC 19008 bytes
SHA-256: a47e7e1a7f588f96cfc101193f57c2dc6cddb94e4e910344d5589f5efd2446e5

Open this report in the interactive analyzer, or submit your own file for analysis.