Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d17370d70314c5b…

MALICIOUS

PDF

65.2 KB Created: 2021-04-25 07:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c8c54015f665c655ced881f189cd5db SHA-1: c561417e6df5857fde6abef83debdf8c6e34cfce SHA-256: 0d17370d70314c5be66c34ff07b3e12fb689850bf319ef4921c2ab94ae48c75e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF document contains numerous embedded URLs, many of which are marked as unknown reputation, suggesting they could lead to further malicious content or downloads. The document body, though heavily obfuscated, contains references to a 'dune buggy wiring diagram', likely a lure to entice users to interact with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.pbttphtk.gov.my/sites/default/files/webform/238550972.pdf
    • https://www.a1touchsolution.nl/sites/default/files/43963154407.pdf
    • https://www.enwidth.com/sites/default/files/webform/resumes/zozagosetimof.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/59286961246.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/39809543560.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/84972388600.pdf
    • https://ambrose.edu/sites/default/files/webform/natogaj.pdf
    • https://www.dgs-interparts.be/sites/default/files/42042694998.pdf
    • https://europa-ts.ru/sites/default/files/webform/81905598419.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/dofivefodazewinewes.pdf
    • https://www.dgs-interparts.be/sites/default/files/jinez.pdf
    • https://www.jwico.com/sites/default/files/webform/xojisipet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=250cc+dune+buggy+wiring+diagram
    • https://community.princeton.edu/system/files/webform/vujipudujusikal.pdf
    • https://www.healthdata.org/sites/default/files/resumes/mavesoriv.pdf
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/wosevojowavinojefe.pdf
    • https://www.healthdata.org/sites/default/files/resumes/68382108709.pdf
    • https://printandmail.princeton.edu/system/files/webform/83605599331.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb87.bin
5b66f500e6d4913e080ae0c2029c0a2367ccb33c790318d779e99fc2e55d0040		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB87 5684 bytes
font_01_sfnt_off0000dee2.bin
6a9daba4fc5b85d3fe67195b41a57ec304ecf473203d3bae2d1c3f29f963a5e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE2 9368 bytes

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