Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a064f625e073850…

MALICIOUS

PDF

45.5 KB Created: 2021-05-14 10:56:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1961b98cb5ecdb247d2b3c75e326ec93 SHA-1: 4de8a30ea465f9ea7f1df5f0543bc9e34c28de8b SHA-256: 3a064f625e073850b072fca50a060bbec87b6fb3eda94295a946f9145ec5efcd
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also features a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hacks-no-human-verification-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/coin-master-hacks-no-human-verification-game-hack
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-free-pin_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-free-spins_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-rare-cards-for-coin-master-christmas_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-game-ios_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-rare-cards-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/wahoo-gaming-co-free-robux_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/facebook-coin-master_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/roblox-com-www_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-roblox-gift-card-codes-2021_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/get-free-spins-link-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c0f.bin
81b6cab395553b2fab982753d326ac66c1441f63edc7560274932e456012310c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C0F 24868 bytes
font_01_sfnt_off000085d8.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D8 2840 bytes
font_02_sfnt_off00008f89.bin
b53d611e96a32094425b068729023046bb1db9f19d10500fe1599e8fd30759af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F89 18248 bytes

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