Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a87bc480772ce9a…

MALICIOUS

PDF

33.2 KB Created: 2021-06-27 07:54:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0593ae166a9947ca06c6753c11e0f1cf SHA-1: dc5e2faf9e7dc9308537252f7bb31f4899aca50c SHA-256: 4a87bc480772ce9a0d551322367148c45d3c8df3d2f1168891c7052f255db6d8
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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 http://netcdn.co/app/431946152/roblox-hacked-bloxy-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/admin-roblox-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-full-lua_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-avatar-free-download_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/best-free-things-in-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hack-2021-noclip_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-have-bcc-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/minecraft-apk-free-download_GM479516143.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_off00002ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CED 21804 bytes
SHA-256: 17b38505ee30ff0e6ea042cdda532abc6b014c1dda6dd0a92d02582341f9d6fc
font_01_sfnt_off00005c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9C 19012 bytes
SHA-256: 0f86cbdb8a64c4e728b251c6620a1bc65e8d82bea3b3e79912b1361bb46e86c8

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