Malicious PDF — malware analysis report

Static analysis result for SHA-256 790bd20db4a6d97a…

MALICIOUS

PDF

38.6 KB Created: 2021-05-21 13:15:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 35751186b47890d627a3a7c3f495efdc SHA-1: 11c83c7096f698c14bded9c779a1ce4022d26572 SHA-256: 790bd20db4a6d97a92d5fbf6ee50988af9241028abe35e5ae88e57f0a079f65d
82 Risk Score

Malware Insights

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

The PDF document contains lures for free in-game currency and impersonates Microsoft Office 365, directing users to a malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to phish credentials or deliver a payload. The document body explicitly contains a call-to-action phrase 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' and a primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/how-to-get-free-minecraft-coins-game-hack.
  • 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/how-to-get-free-minecraft-coins-game-hack PDF link annotation
    • http://studio-dentistico-fiume.com/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/block-best-robux_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003456.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3456 25424 bytes
SHA-256: 25b0bcce97b8af11f0daa80d2accda6f44308904abcab14582835d8625f54012
font_01_sfnt_off00006d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D24 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off000076c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C3 17872 bytes
SHA-256: d5c0ce671414cbd9fc7744383c2fd0353f594f7f374d2c17e81bdfc3f7754bab

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