Malicious PDF — malware analysis report

Static analysis result for SHA-256 1169a28b7be88f2a…

MALICIOUS

PDF

72.8 KB Created: 2021-04-09 02:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b9b2153dc74fe53c90d7ca2a8ededca SHA-1: 89d0036836f861d24536bbf0d24816e43a57c01f SHA-256: 1169a28b7be88f2a1962dccd8e982341b4688844bb414bc5c7546d7d0b60ec57
94 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as potentially malicious. The document body, though heavily obfuscated, suggests a lure related to 'Nj transit bus schedule 197 pdf'. The presence of PDF-specific heuristics and a high ML classifier score indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9763

Heuristics 3

  • 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
  • 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://ambrose.edu/sites/default/files/webform/gewematumupam.pdf
    • https://www.dgs-interparts.be/sites/default/files/60165950635.pdf
    • https://www.newburghgroup.com/sites/default/files/webform/resumes/tikijoti.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/15194676649.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/51762260361.pdf
    • http://www.friendlycc.com/sites/default/files/webform/16921441106.pdf
    • https://ambrose.edu/sites/default/files/webform/20598750849.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/zavemazawutojene.pdf
    • https://ambrose.edu/sites/default/files/webform/sovurusogizafubeb.pdf
    • https://ambrose.edu/sites/default/files/webform/talizovub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=nj+transit+bus+schedule+197+pdf
    • https://minorsoncampus.princeton.edu/system/files/webform/jawugu.pdf
    • https://campusrec.princeton.edu/system/files/webform/putiwokareviwe.pdf
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/gijewosatesozug.pdf
    • https://gradfutures.princeton.edu/system/files/webform/49692556615.pdf
    • https://lib.asu.edu/system/files/webform/98562832035.pdf
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/27560642257.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d8.bin
68d894cc61067cfe959cf7688482fd48af90c6732a8b6faced26047881ba0445		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 5716 bytes
font_01_sfnt_off00010653.bin
faed68961cccec6ec6e4c841f23fe73aab3ea032868329ae51dc2a82a92fb389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10653 10812 bytes

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