Malicious PDF — malware analysis report

Static analysis result for SHA-256 70eaa2e737b0351d…

MALICIOUS

PDF

78.2 KB Created: 2021-01-01 17:02:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7e7a08c2e047a8d9d5ab7277ad9ae944 SHA-1: 5413770f8c60f3df03bb7cc9db9631f21f147f15 SHA-256: 70eaa2e737b0351d767c77489de335c9d5edf4288174e83b135dcf4288835a25
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, likely intended to trick the user into clicking it for a chat. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://traffset.ru/strik?utm_term=i+am+bored+i+want+to+chat PDF link annotation
    • https://fesitafixob.weebly.com/uploads/1/3/4/6/134653549/jipomekorimaviwevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5fbb733e31af4.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/fukujuj.pdfIn PDF document text
    • https://gedolumu.weebly.com/uploads/1/3/4/7/134761272/demojokis.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/iegj6dW/fefobaxekoputovubumubixuv.pdfIn PDF document text
    • https://cdn.sqhk.co/baponakazu/ihiicmu/79723696242.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f9e17e41-0c13-4bf4-a5b5-8d68362a6191/tuwabopulaj.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/besujavebajepokodas.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/assembly_programming_and_computer_architecture_for_software_engineers_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFD 4928 bytes
SHA-256: 94bb5215af33ded4880b061521d49778db73b7d2106b6a2efc68d690554a5de0
font_01_sfnt_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 2532 bytes
SHA-256: 1db701b2b3aeec4451dbe3e728dbca4e948e4f35046bf80d0d1587cf451fc989
font_02_sfnt_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 9992 bytes
SHA-256: 5388eb71cd63e0bf9abf124848dad46a08270f984d8c77369f6faf08a49042f0
font_03_sfnt_off00011dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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