Malicious PDF — malware analysis report

Static analysis result for SHA-256 d233340ef4b161db…

MALICIOUS

PDF

61.1 KB Created: 2020-11-20 15:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3e0847f588956e49a5a75b488bf81e4e SHA-1: d276647d262884c609b3cebd19e43bace238122a SHA-256: d233340ef4b161dbbdc729378bb1c6c9cf0aea80acd9b6037cd47bc5e8b8a1c8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=gram%25C3%25A1tica+pedag%25C3%25B3gica+do+portugu%25C3%25AAs+br PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5fae00d279873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_5f9c4809c8875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_5f910ae444cc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_5fb6dadbc0943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5fb727fdd1c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466370/normal_5fa7bd8eb722d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5fa8dad7e843a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5fae1a6e38d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f93028cdbf31.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/mufukep/molecular_and_empirical_formula_worksheet_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548ce6fa-66b4-4596-ad26-f18630e0b73e/14712837918.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/endocytosis_and_exocytosis_are_forms_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d47b4ee-08fe-4ff4-8071-6247e5e17328/bifamiv.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_off0000aec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC5 6052 bytes
SHA-256: a57756ce424666944f77a96252086266a0a9638e715dcd6ed5c72c1de337abbb
font_01_sfnt_off0000c226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC226 11548 bytes
SHA-256: 196c1b9c1526460c573913adc3d11d1bdf43ef94a03c0ef492ea4fc023661216

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