Malicious PDF — malware analysis report

Static analysis result for SHA-256 2319ff3891e6d4c4…

MALICIOUS

PDF

77.8 KB Created: 2020-11-12 16:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 15ed1c1a8e94debaa1e5a2e328121a2e SHA-1: df79c4fae9ac83a8596e29aa5c4a233298e0c55d SHA-256: 2319ff3891e6d4c48db06af3f37884066777eff788bb1967efdd064981f77f56
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 0.9998

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://trafftec.ru/strik?utm_term=moral+letters+to+lucilius PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f97490ecf180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_5fa07c6ce71f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f88a796293d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f88b08248a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_5fa73020df0cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_5fa4adbe2e997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_5fa372b37df76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f98d5e6cab1b.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/bubisifapagefe/widekejufenigikukoze.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/65964821232.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/avast_license_full.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/54436087532.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_off0000e595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 4796 bytes
SHA-256: a27f112dfad6f3482a82afeb8844cf14bbdeddf38a5747fa31163c0b49ce9ccc
font_01_sfnt_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 17196 bytes
SHA-256: 65fa14e07610315d4686aa6c896d92fa94ff2ff6bd6e20d7c33ed6340c7e22ee

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