Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eda23b760e18103…

MALICIOUS

PDF

115.8 KB Created: 2020-11-23 17:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f6c49f2c0768cdb5232100c4516c95df SHA-1: 0a83e50dfa4241e2cf9499dfae6af6ab32321ffb SHA-256: 3eda23b760e18103772543588632c24de495e59b7d293df3e94dbea6f3785676
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics as an external URI and flagged by a machine learning classifier and ClamAV as malicious. The document body, though partially garbled, contains text that appears to be a lure, suggesting the PDF is designed to trick the user into visiting the malicious URL for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafffe.ru/strik?utm_term=es+el+m%25C3%25A1s+fuertes+h+102+p%25C3%25ADldora PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5faf0a682d057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390684/normal_5fa7ad7e21869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5fb2daba068cf.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/nawosineromigi/96003020127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ac28b5-e0f8-4743-a055-d73b69dcb3c8/zovemutuvufi.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/93215186168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d17cf3a7-4c56-47a9-ae35-964cc4871bdb/8582910664.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/34999987016.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/analytic_geometry_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/636f7dce-db38-4883-aadd-34db602749e9/nuweduposuwuwiwutizub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000177f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177F8 2960 bytes
SHA-256: 3c6502e04658d985b37ed967139d4b1bb7136c1c8ff06868e6b64c17630b7d50
font_01_sfnt_off0001827b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1827B 5852 bytes
SHA-256: ba4f86a4271ef133c7e1b8bbe4fae9cd18cb387d8cac81f84a769b1147c4ff26
font_02_sfnt_off000195a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195A7 12872 bytes
SHA-256: c0e486e907a11da057e3d58be70e0f8e52e17fec54f09002c8d6b47448501b46

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