Malicious PDF — malware analysis report

Static analysis result for SHA-256 c375d6b4ad6fe737…

MALICIOUS

PDF

75.4 KB Created: 2021-02-21 00:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 00fed57a5ffbfb33c23c497d4509a037 SHA-1: 60f0da3b9ec66437f1f53b29f29690bcfb61fd4b SHA-256: c375d6b4ad6fe737a27a677ec6a1362a9edba838f8987517ce8130ab1ff41d31
96 Risk Score

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-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://jottigo.ru/123?utm_term=air+force+1+valentine%2527s+day+2006 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379477/normal_5ffb35b2ac17b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471081/normal_602885d2d9200.pdfIn PDF document text
    • http://hookup754.fun/fevonuliponixobofajevfjoff.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/hfihgcl/sigewedexotunapabigutusew.pdfIn PDF document text
    • https://cdn.sqhk.co/fixefalid/cicgg0y/jugafupoxaxusesu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374853/normal_5fdd5e23a719c.pdfIn PDF document text
    • https://cdn.sqhk.co/vurifozi/D3wijhe/snake_game_online_classic.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/AZPf5hh/download_eve_special_forces_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/cgeop5u/rumekubemilofozasex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446151/normal_6016c2e769374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469128/normal_5fe15d4d548f3.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/xabalaru/da_3161-_1_continuation_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/other_stories_jeans_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/rera_dubai_tenancy_contract_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/bomiguveji.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_off0000e9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 5680 bytes
SHA-256: a2037e8df5b3a1a861d6822c6d929d760b5108cf0e667aa2ef949667ba94bf55
font_01_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 10440 bytes
SHA-256: f045a5468293edf48877612cd916f9ff6ae3d99d80df51d564ec804eadd7239c