Malicious PDF — malware analysis report

Static analysis result for SHA-256 e695670a8d181e1c…

MALICIOUS

PDF

76.8 KB Created: 2021-06-05 00:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5742f5435c84d0f12875336d7dc528de SHA-1: 9b75c3cbb8aa52769a60b6f9419f16adf5a4831b SHA-256: e695670a8d181e1c9e6f45bef8163a8c18c9320586f899d421945fa41e645c26
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and embedded URLs. The document body, though heavily obfuscated, suggests a lure related to a software manual. The primary IOC is the external URL which likely serves as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://irlanc.ru/uplcv?utm_term=staad+pro+connect+edition+manual
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/81519d0633768195454279527268795c/jasunubenagew.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9a5f63e97---wekatigobewepori.pdf
    • http://veraschwemmle.de/fckdata/file/32195644145.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/a1e970aa43aa1727aed58cf59af178db/96769595883.pdf
    • http://kbchina.de/upload/61136860509.pdf
    • http://ahkjt.com/upfile/file/kevovebomegefum.pdf
    • http://aep-tc.com/cache/fck_files/file/vogupuromugofakakukiwu.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afd1cfb1e99---5894061159.pdf
    • https://flardochform.se/userfiles/file/526085187.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77fb0eabef---dugirosedoxigir.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/c5ebf2c4c2c7683cc84d34ef3f7d7369/folexawozixazol.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/ee313ced2af1bf7daab49f6d25e879a6/viduf.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/248f54ffab1573babdc31ca6f41685cd/8359966866.pdf
    • http://alkanboya.com/files/file/%5C/73245961785.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/sdqaahtmr65mn515f6mqts9656/wifowigar.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/e61c462fc806eb8b89d7fa5bdba7ea1b/jujew.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/729b35522e7dcbdbc80923d5fb5794ac/54368313820.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e359.bin
4f12f32556cb1439cfaa4e3162bcfa73e6ade4fc4f41f3c9baf1318e2a320c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 5028 bytes
font_01_sfnt_off0000f445.bin
8916029ed3c9a603867ce6c7bc9cf9eea0a717c37513ac1e3f30188a0665d833		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 10544 bytes
font_02_sfnt_off00011828.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11828 4324 bytes

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