Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f2e4731e555b2e…

MALICIOUS

PDF

44.4 KB Created: 2021-05-19 21:40:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 143b73df4c903f6d0e5dfe8d6ac49138 SHA-1: 12b7978ba60088dd7a99e677a47df3bd1a97b269 SHA-256: 20f2e4731e555b2ec4063601376f296e04f6582ef62104e54fbcd77c84e4860b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a high number of external links, many pointing to an IP address, suggesting a link farm for SEO-based scams or malware distribution. The presence of a "download button" heuristic further supports a malicious intent to trick users into downloading files. While no scripts were directly extracted, the PDF structure and URI heuristics indicate a pattern of redirecting users to potentially harmful content.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.xyz/app/406889139/coin-master-download-game-hack
    • http://110.232.83.89/slimsppks/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-roblox-premium_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-here_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • http://110.232.83.89/slimsppks/repository/free-robux-no-verification-at-all_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/pokemon-go-free-quagsire_GM1094591345.pdf
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-youthnow_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-download-apk_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/free-robux-codes-no-verification_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/free-minecraft-maps_GM479516143.pdf
    • http://110.232.83.89/slimsppks/repository/best-hack-for-coin-master-2021_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/free-coin-master-spins-no-human-verification_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/get-robux-for-free-2021_GM431946152.pdf
    • http://110.232.83.89/slimsppks/repository/coin-master-hacks-for-pet-food_GM406889139.pdf
    • http://110.232.83.89/slimsppks/repository/daily-coin-master-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005059.bin
720a8dba04c8e79f85d0013cd4827faa3eeeea3b2800e327e0941d2d6a786aec		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5059 25620 bytes
font_01_sfnt_off00008bd8.bin
5249e296d4e98cbf63458d60065d08f788638b222f85d6c58d160e1a36990528		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD8 18124 bytes

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