Malicious PDF — malware analysis report

Static analysis result for SHA-256 e93d80e6834f23d0…

MALICIOUS

PDF

102.9 KB Created: 2020-11-22 04:04:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4f01ab98bed2855ce550379241d60734 SHA-1: 1d6187efa6827d34237d5ae42827981f878b2f17 SHA-256: e93d80e6834f23d0c007148dbbbcbb3402a3d26b5b2164a8a18973940583c0e5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'trafffi.ru' was extracted, suggesting a phishing or redirection attempt. While no scripts were directly extracted, the PDF structure and the presence of external links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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://trafffi.ru/123?utm_term=dichloromethane+methanol+boiling+point PDF link annotation
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/efcb203cd5.pdfIn PDF document text
    • https://vowufesoval.weebly.com/uploads/1/3/4/8/134885018/0d384a7e696d2.pdfIn PDF document text
    • https://ruregeriwak.weebly.com/uploads/1/3/4/6/134666462/jeduxowotunapim-zazunudi-kugudiferagixof.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/928298.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/henghuili-files2/biotechnology_principles_and_processes_class_12_notes_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/elder_scrolls_online_sip_of_stamina_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0593901-f21e-40a0-b53c-300941c2772c/que_es_la_sensopercepcin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a399568c-f436-4d5a-b714-0665a02383e0/nusamemar.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/a_lot_of_lots_of_worksheets.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 6492 bytes
SHA-256: 0acae127d432746d095b5bd0375a0897f34f14d5dd3edc903598d39ab18e2e5d
font_01_sfnt_off0001022a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022A 26028 bytes
SHA-256: 9e31f099af2c0eca3daf482d010da879610b2ad638172f5d4bddb68db8cbbedc
font_02_sfnt_off00015457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15457 5308 bytes
SHA-256: 8816bdfccb21521bf5a17cd827310891c160277f0a40685d154bdeb43124ade0
font_03_sfnt_off0001663c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1663C 11896 bytes
SHA-256: b051e9537accc2908315004a550ec0d7ed70b69eeaf98a7b586acd46c3df01f0

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