Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc1a5e0f7418eff…

MALICIOUS

PDF

40.7 KB Created: 2021-05-16 23:52:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9d927df54c578f4e2e1e719e38c03e45 SHA-1: e618cb59684a0240304423535a3c369822448c5f SHA-256: dcc1a5e0f7418eff231c453729c835824ed0d9e686d214fbf27d2c6b89fc2883
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The ML classifier also flagged the PDF as malicious. The document body and embedded links point towards lures for game hacks (Coin Master, Robux), indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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.xyz/app/406889139/how-to-hack-coin-master-game-ios-game-hack
    • http://ivpr.net/images/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://ivpr.net/images/50-free-spins-coin-master-links_GM406889139.pdf
    • http://ivpr.net/images/how-to-get-free-robux-hack_GM431946152.pdf
    • http://ivpr.net/images/twitter-coin-master-free-spins_GM406889139.pdf
    • http://ivpr.net/images/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://ivpr.net/images/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://ivpr.net/images/app-master_GM406889139.pdf
    • http://ivpr.net/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://ivpr.net/images/free-ways-to-get-robux_GM431946152.pdf
    • http://ivpr.net/images/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://ivpr.net/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • http://ivpr.net/images/coin-master-link-for-spins_GM406889139.pdf
    • http://ivpr.net/images/roblox-c9m_GM431946152.pdf
    • http://ivpr.net/images/coin-master_GM406889139.pdf
    • http://ivpr.net/images/free-games-like-roblox_GM431946152.pdf
    • http://ivpr.net/images/coin-master-34-4-free-download_GM406889139.pdf
    • http://ivpr.net/images/roblox-phantom-forces-hack_GM431946152.pdf
    • http://ivpr.net/images/boost9-com-roblox-hack_GM431946152.pdf
    • http://ivpr.net/images/minecraft-free-version-pc_GM479516143.pdf
    • http://ivpr.net/images/coin-master-free-cards-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045f4.bin
98781aca9884be0e1d35d3751f4c7a061b81304bbfa2b6d8c5fd16cd31f4264a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45F4 24572 bytes
font_01_sfnt_off00007d3d.bin
b80dece7d8ec4d9222cf5aed29a2a21d72ad5f5cbe697ae1d456d8a38991e3ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3D 18140 bytes

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