Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48ae530bb7c11db…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 08:23:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1011e175b1f06ef1430c26a99ffd72d4 SHA-1: 9142fd9ccde0f76e79918d86868f3166a192851c SHA-256: e48ae530bb7c11dbe10315c0c82f78cf25e39f2621f9a11977fb3638c2c25068
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that point to websites offering free game currency or accounts. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. The document body, though partially corrupted, contains text related to free Roblox accounts and links to similar scam sites, suggesting a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/free-roblox-accounts-discord-server-game-hack
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://pustaka.stikesperintis.ac.id/repository/free-coin-master-cards-link_GM406889139.pdf
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://pustaka.stikesperintis.ac.id/repository/but-link-says-free-robux_GM431946152.pdf
    • http://pustaka.stikesperintis.ac.id/repository/roblox-hack-tool_GM431946152.pdf
    • http://pustaka.stikesperintis.ac.id/repository/best-hack-for-coin-master-2021_GM406889139.pdf
    • http://pustaka.stikesperintis.ac.id/repository/free-minecraft-worlds_GM479516143.pdf
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdf
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-download_GM406889139.pdf
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-instantly_GM431946152.pdf
    • http://pustaka.stikesperintis.ac.id/repository/latest-free-spin-coin-master-daily_GM406889139.pdf
    • http://pustaka.stikesperintis.ac.id/repository/free-minecraft-client_GM479516143.pdf
    • http://pustaka.stikesperintis.ac.id/repository/is-windows-10-minecraft-free_GM479516143.pdf
    • http://pustaka.stikesperintis.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://pustaka.stikesperintis.ac.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://pustaka.stikesperintis.ac.id/repository/free-to-play-minecraft-servers_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052fb.bin
ee0067d3cb035bf33a54b0d94ff3538559ba540f36664aa571e4411987fcedd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52FB 25460 bytes
font_01_sfnt_off00008b81.bin
9f8d9033f0c8436152d176c356929c1567acb201c787257ec46b85591610032c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B81 3176 bytes
font_02_sfnt_off0000967a.bin
98f5dea5042c39159a02dcb3e726f11c5c0a3e259daeff45e8cd12ce726c91f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x967A 18768 bytes

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