Malicious PDF — malware analysis report

Static analysis result for SHA-256 286443292cb0390b…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 04:18:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6c470be06012982337c3d1191477441e SHA-1: 77377ed0549457cbcd086625cbb9e35599504a49 SHA-256: 286443292cb0390b26157c91eeaf1764a95130953718c880e97dc16fee1cacf1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a "secret recovery" lure, strongly suggesting a phishing or credential harvesting attempt. The document body and extracted URLs promote free game currency and accounts, which is a common lure for such attacks. The presence of a PDF URI heuristic and the ML classifier output further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/free-robux-no-survey-2021-no-verification-game-hack
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/daily-free-spins-and-coins-coin-master_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/reddit-coin-master-hack_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/roblox-c9m_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-gifts_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/i-cant-get-free-spins-coin-master_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-roblox-accounts-that-work_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-synapse-x-roblox-for-free_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/minecraft-for-free-games_GM479516143.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/blox-rewards_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/80-free-spins-coin-master_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/sites-to-get-free-robux_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-cards-free_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053fe.bin
d0aaf63d08eebd008b728d1868603e669c74485e7b981ea6ac189df978b81fd9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53FE 25228 bytes
font_01_sfnt_off00008e79.bin
2ddd6dbbecb80c0c87056b1d717cd5c5a0ac481883cc4aacab3754ea292e1c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E79 19296 bytes

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