Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4ba4392a54fa8b…

MALICIOUS

PDF

47.5 KB Created: 2021-05-20 22:13:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d225d5b6b1f840cd7109a417d907b981 SHA-1: 73c2b5452f0ee05c870d6f6b59965dd91c4696f7 SHA-256: ee4ba4392a54fa8bbe5ef022d76ecfa6fea3a166a291ccfaddcac16b755e1a6e
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to lure the user into clicking a link. The embedded URLs, such as 'https://netcdn.xyz/app/479516143/minecraft-apk-download-v1-14.4-2-free-game-hack', suggest the intent is to trick users into downloading potentially malicious files disguised as legitimate software or game downloads. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7663

Heuristics 4

  • 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/479516143/minecraft-apk-download-v1-14.4-2-free-game-hack PDF link annotation
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/what-is-tiktok-make-your-day_GM835599320.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/getrobux-info_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/oginject-co_GM406889139.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003397.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3397 25048 bytes
SHA-256: c07988db61439554cc5ab923c7a42a7f0c08c3e2538359baedb99ba8011ff7ae
font_01_sfnt_off00006d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1E 8248 bytes
SHA-256: 3ebc046353ffc9226d68c2ce7b630ed1ce2e3941836f6c2a76c9722738d69407
font_02_sfnt_off00008726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8726 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off000095b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95B2 19128 bytes
SHA-256: 93ea6bd85251d95bb8fdb3e1515e0b836a385cc2448c0aeb3adc981293f46b66

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