Malicious PDF — malware analysis report

Static analysis result for SHA-256 36394e5f8c1fc48a…

MALICIOUS

PDF

44.1 KB Created: 2021-06-09 03:59:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4cb82a5bc593407f4c36095facb47f09 SHA-1: 079e1471aa5ef48274407eda94c39e8821521a80 SHA-256: 36394e5f8c1fc48a58b981c23c71b6869fb02bf27257841403c4f025b57dc63c
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a call-to-action phrase, strongly suggesting a phishing or social engineering attempt to trick users into downloading further malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs point towards lures for free in-game items, a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.tw/app/431946152/how-to-get-free-robux-and-tix-youtube-game-hack
    • http://202.56.165.220/digilab/repository/free-coin-master-game_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/roblox-the-scary-elevator-red-key-locations-cheat-sheet_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-2021-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/roblox-svg-free_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/get-anything-free-catalog-roblox-pastebin_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/robux-free-com_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/hack-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/coin-master-hack-without-downloading-apps_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/coin-master-instagram-free-spins_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/free-minecraft-mods_GM479516143.pdf
    • http://202.56.165.220/digilab/repository/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-hack-a-roblox-account-2021-easy-on-pc_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/is-windows-10-minecraft-free_GM479516143.pdf
    • http://202.56.165.220/digilab/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/wahoo-com-free-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/codes-how-to-get-free-robux_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-robux-gift-card-generator_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/robloxmatchcom-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005045.bin
a3ae74107fb787aa2a163d663d7b827bf9de837c1220591622bc70b6e789ab94
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5045 24556 bytes
font_01_sfnt_off00008849.bin
25fb14873a92929b361d6c75f0c72aaa155fd87633a3426b701e3486ca476427
pdf-font-stream PDF embedded font (sfnt) at offset 0x8849 18740 bytes