Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f6db6d7b045fa1…

MALICIOUS

PDF

78.5 KB Created: 2021-04-04 12:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92374d71fcdfb973cad18278a7c82d37 SHA-1: 78ceb90be4f594dd294905fed7b870c501f44a21 SHA-256: 96f6db6d7b045fa1c04b2624a439b0fb76c771720d1cc37c4b3ac48c2e92eb2b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics as an external URI and flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains keywords related to search terms, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the presence of the malicious URL is a strong indicator of malicious intent.

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://vilenefex.ru/wix?keyword=pegasus+faucet+parts+home+depot
    • https://cdn-cms.f-static.net/uploads/4505837/normal_604556f1a8fcd.pdf
    • https://cdn-cms.f-static.net/uploads/4416318/normal_602f89b887b99.pdf
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5ffa5f8112d77.pdf
    • https://static.s123-cdn-static.com/uploads/4405654/normal_5fcadee3987bc.pdf
    • https://static.s123-cdn-static.com/uploads/4451374/normal_5feeb67cac2d1.pdf
    • https://cdn-cms.f-static.net/uploads/4374699/normal_6011c5d04328b.pdf
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5fe18a51b2ac6.pdf
    • http://dewobazul.22web.org/acknowledgement_in_research_report.pdf
    • https://static.s123-cdn-static.com/uploads/4471686/normal_6002ab94a7699.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xomepixo/giser.pdf
    • https://s3.amazonaws.com/dexodekelaseki/aha_asa_guidelines_subarachnoid_hemorrhage.pdf
    • http://gigisijopa.epizy.com/60147508022.pdf
    • https://s3.amazonaws.com/lorifumofelu/jogimazijafavofatog.pdf
    • http://xosareregaka.epizy.com/76281961865.pdf
    • https://s3.amazonaws.com/belopudevuzuza/69944791888.pdf
    • https://s3.amazonaws.com/sogovekevi/toshiba_50l3400u_led_strip.pdf
    • https://s3.amazonaws.com/sojaxub/sample_essay_ielts_writing_task_2_general_training.pdf
    • https://s3.amazonaws.com/xiwevitox/47621224324.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_off0000f51a.bin
afc6bf9088377cb65e291d61fc4ae470a33ce7a1252acb3f313645c5a4e2029a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF51A 5540 bytes
font_01_sfnt_off000107cb.bin
c2daa4fb53dd68681e1eab8101524dba12a0f27bf1d22331792db4e6a8c56de9
pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 11128 bytes