Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e9be6a3bacba29…

MALICIOUS

PDF

43.6 KB Created: 2021-06-04 00:51:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4f7afcecbd10932ac82a04fa3d062c6e SHA-1: 3e4bdd8e60a527fada5213f63b5f7975a9b213b6 SHA-256: b8e9be6a3bacba29b4bdbc4a0e41c9710b442dc4cbf24818b846ebeb3aec4b13
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, including a primary URL pointing to a 'free spins' hack, and a large number of other PDF links generated for SEO purposes. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests the document is designed to redirect users to potentially malicious websites. No scripts were extracted, but the document structure and embedded links indicate a lure for game-related cheats or potentially phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-spins-on-coin-masters-game-hack
    • https://digilib.stikesindramayu.ac.id/repository/free-spin-and-coin-links_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-coin-master-links-blogger_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-ways-to-get-robux_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-minecraft-account_GM479516143.pdf
    • https://digilib.stikesindramayu.ac.id/repository/hack-coin-master-net_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-coins-on-coin-master_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-cheap-pubg-uc_GM1330123889.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/10-free-spins-coin-master_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/coinmasterdailyfreespins-com_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/roblox-but_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/play-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005124.bin
55d57e0cda0dfc3e651726d302ba966a52ce28370ab2736e7397054b5411e287		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5124 24652 bytes
font_01_sfnt_off000088e4.bin
addbd5428a422ca7211e94293fed3a4f98c85d5f6337328d4d3623e90d90c649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88E4 17884 bytes

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