Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea929053e98905fa…

MALICIOUS

PDF

45.2 KB Created: 2021-05-17 17:03:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9082790152e935eb5a2bc04e74b35e9a SHA-1: 0135a82ed7ef0d8ee48a26b12856857f930b408f SHA-256: ea929053e98905fa4affdbca25d943be777fe1fc738fe4f5d42a17dcc754ded8
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also hosts a large number of external links, many of which appear to be SEO-optimized for game-related scams. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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-free-spins-daily-2021-game-hack
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-ios_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-hacks-free-spins_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-apk_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-minecraft-account-and-password-generator_GM479516143.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/fbchampion_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021-ios_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master-blogger_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/spin-and-coin-link_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/who-to-get-free-robux_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/hack-coin-master-without-human-verification_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/hacker-minecraft-song_GM479516143.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-gfx-roblox_GM431946152.pdf
    • https://e-learning.mtsn5klaten.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a7b.bin
061e1b1ec96c2ee7cce55842b2c63009070729b780ac39415e7eaf21753e06c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A7B 24540 bytes
font_01_sfnt_off000082a2.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A2 2880 bytes
font_02_sfnt_off00008c8c.bin
6b4e533402effa4bef1f1a99bc4bd1715a96498a79031c9daf0202c2985212b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8C 18708 bytes

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