Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a0ee44cfdd5871…

MALICIOUS

PDF

73.6 KB Created: 2021-04-10 14:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 230a47c0719d5c6c976e63ae3fc34020 SHA-1: 2af82f5d432c9b3c82651607e5d7c803f443f0bf SHA-256: 94a0ee44cfdd5871731aacaf0d50b4f85387d6259cc8d012e7f269e49e560456
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Kim Kardashian energy hack' and the wkhtmltopdf tool, suggesting a lure to disguise malicious content. The presence of numerous embedded URLs, many pointing to potentially compromised legitimate sites, indicates an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://www.ofalloncasting.com/sites/default/files/webform/66890294103.pdf
    • https://natsihwa.org.au/sites/default/files/webform/degajakuko.pdf
    • https://www.afscme65.org/system/files/webform/fabituwinuxofi.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/xaduxiwipel.pdf
    • http://oaklandchildcare.org/sites/default/files/webform/bidepe.pdf
    • http://pilgrimland.com/sites/default/files/webform/resume-uploads/61975266633.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/dutaberapowuniz.pdf
    • http://www.sumnercountyhospital.org/sites/default/files/webform/vetasitumuwogemukuruv.pdf
    • http://cicatsalud.com/html/sites/default/files/webform/53132673180.pdf
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/16831560309.pdf
    • https://www.jwico.com/sites/default/files/webform/47965191786.pdf
    • http://www.grotekeukens.be/sites/default/files/webform/gmawards2018/98751459569.pdf
    • http://portal-mysigma.com/system/files/student-proof/62332338419.pdf
    • http://www.pacificsportfraservalley.com/sites/default/files/webform/12938533755.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=kim+kardashian+energy+hack
    • https://gradfutures.princeton.edu/system/files/webform/25860956451.pdf
    • https://lib.asu.edu/system/files/webform/rutepirunumobapof.pdf
    • https://www.vub.be/sites/vub/files/webform/piwolumubixu.pdf
    • https://lib.asu.edu/system/files/webform/midari.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb2.bin
ffd3ed920cad623557e8f66710d0d10dbc319f1cc0ced62bb68bad5be0e42821
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 5456 bytes
font_01_sfnt_off0000f21e.bin
476bf4a18d05262a857e86e7530aa824a292452c1a527f278961570978123e09
pdf-font-stream PDF embedded font (sfnt) at offset 0xF21E 11740 bytes