Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ece8ba3ab978a6f…

MALICIOUS

PDF

34.2 KB Created: 2021-06-26 23:03:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f1ccb09cd73a8456afe9481a23c324d4 SHA-1: 1c319ddb145aa097d039fa7e344d4d0fd3881c91 SHA-256: 1ece8ba3ab978a6f2ba7902b5a0eda153e3bf81dfb560f362b47f3a78e451128
142 Risk Score

Malware Insights

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

The PDF contains numerous links, identified as a link farm, that lead to pages promising game cheats and free currency. The primary URL, http://netcdn.co/app/431946152/cheat-on-roblox-ghost-simulator-game-hack, is presented as a lure for game hacks. This suggests the document's purpose is to redirect users to potentially malicious sites or initiate downloads, aligning with a phishing or malware distribution tactic.

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.co/app/431946152/cheat-on-roblox-ghost-simulator-game-hack PDF link annotation
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-game-shut-down-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-pokemon-brick-bronze-how-to-get-free-eve_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-cheat-exploit-juillet-2021-for-car-crusher-2-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/cheat-engine-executor-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/spin-links-for-coin-master_GM406889139.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_off00003079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3079 21808 bytes
SHA-256: 61ad640e4a73de3ab7332c8a6e0d5b635c23e547a5bb3ad1a836db7347c42945
font_01_sfnt_off00006030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6030 19276 bytes
SHA-256: f9d1dcda1dfeb22cb5b72b8ea2a68fca2cb7c5e745dc9a6cfd8f4287cb16f4fe

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