Malicious PDF — malware analysis report

Static analysis result for SHA-256 2425276a53a2ff8e…

MALICIOUS

PDF

46.0 KB Created: 2021-05-15 10:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 90b9579a8a16cd1f583684697f5a53d1 SHA-1: 3b9551f9028c4e102dcb0e53197894e1cff42a28 SHA-256: 2425276a53a2ff8e79550eedfad677730d8e2cd373ed94bd3ca35a6747900110
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to resources related to game cheats and hacks, such as 'how-to-become-a-hacker-in-roblox' and 'coin-master-free-spin-codes'. The presence of a PDF link farm heuristic and the ML classifier flagging it as malicious strongly suggest a malicious intent. The document body, though partially garbled, contains references to these lures and an external URL, indicating a likely attempt to direct users to malicious sites or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/431946152/how-to-become-a-hacker-in-roblox-game-hack
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-free-spin-codes_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-coins-and-spins-link-for-coin-master_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/minecraft-tools_GM479516143.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-do-you-download-minecraft-for-free_GM479516143.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-date-and-time-hack_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-roblox-card_GM431946152.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/mcpe-hack-client_GM479516143.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/hack-mod-coin-master_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/coin-master-daily-bonus-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c15.bin
ec71913522316c25204bae0257b38ddd9252aa2b075cf7d54f90d5fd5c615280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C15 24648 bytes
font_01_sfnt_off00008385.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8385 3884 bytes
font_02_sfnt_off0000902c.bin
64431d83c1c466192ca6f90c953545fb4db60ca1c30fe2a26ad653d3315a559e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x902C 18608 bytes

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