Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83f2b3c94bd2851…

MALICIOUS

PDF

396.7 KB Created: 2020-12-17 23:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d5504124ed73877fd03613d8cbdff3f3 SHA-1: c144eb9c7fdaefeca629909affa85e1834c5d263 SHA-256: e83f2b3c94bd28515a5b81a0f7cebd6f84e608c611b99f907a2225958347689b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=springfield+ohio+news+leader+obituaries', which is presented in a context that mimics an obituary page. This suggests a phishing or social engineering attack aimed at enticing users to visit the malicious URL. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9870

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://trafficel.ru/123?utm_term=springfield+ohio+news+leader+obituaries PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385202/normal_5fc8d8daf157a.pdfIn PDF document text
    • https://vonolorijamitef.weebly.com/uploads/1/3/4/4/134452045/e92a327b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_5f96642a4c343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_5fd3788359486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5fa58a4c11945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5fa4534b77607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/bekadamodutomu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16c3d6b97992eb55fb768/t/5fcde4fb6f0099009e86c934/1607329020904/horizon_classes_agra_uttar_pradesh.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fc0ec3708845d0924abc0be/1606478905173/best_apk_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/what_are_attributes_of_an_outstanding_teacher.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/reactjs_vs_vanilla_js_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/best_free_dvd_burning_software.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/powimutofutov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ce2b1c-45cb-422f-b0f2-db2a455c73d1/sony_ubpx800_ca.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005e8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8EC 5636 bytes
SHA-256: 7eff868377c9de4b7447dec038e6803161d68f67195e4edcb37a33b39164bef5
font_01_sfnt_off0005fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC21 11876 bytes
SHA-256: 050be09ba0eb8a69a4d4ed7c7548301e35f235f96ecee36220646ba5c8e4aac9

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