Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c96536cb7c63ce0…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 23:09:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a70666e24e5f879cbba8e392b7fa539b SHA-1: 516a4421217c9d8673812bcd5b6294db5805f6e7 SHA-256: 2c96536cb7c63ce0dd9e751d59634960fea4ede804b6059c4869d6da83265644
142 Risk Score

Malware Insights

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

The PDF document contains numerous links to websites offering game hacks and free in-game currency, such as 'Roblox Studio Free Robux' and 'Coin Master free spin'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of many external URLs indicate a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the lures suggests potential exploitation or redirection to malicious 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.
  • 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.
  • 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.tw/app/431946152/roblox-studio-free-robux-game-hack PDF link annotation
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-hack-robux-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-game_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-inject-proxo-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/roblox-how-to-get-free-clothes-2021_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/roblox-hack-download-pc_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
font_00_sfnt_off000030d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D6 22624 bytes
SHA-256: 118585333a6596218119b14682d1589e9f4306ad4772cbcfd9c3ddb9ca26fd41
font_01_sfnt_off00006362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6362 19188 bytes
SHA-256: a8f681c18c5380531c3743548279ef24b074491e5ef3cbdd9afbc7b3c7c74193

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