Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fd8e2b3614b3d8…

MALICIOUS

PDF

85.1 KB Created: 2021-04-09 07:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0226b6655263688bd339efa09b425d75 SHA-1: 701c2aab4a0061bf1a86364db2378b27728dd87b SHA-256: 45fd8e2b3614b3d87e7924fb826c4e0d2080d66296805e607a7ad8182f092374
96 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with the primary one being zajinet.ru, suggesting a phishing or redirection attempt. ClamAV and ML classifiers flagged this PDF as malicious, indicating it's likely a phishing lure designed to trick users into visiting a compromised site. No scripts were extracted, but the presence of external URIs and high ML confidence points to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=innova+multimeter+3320a
    • http://vipadminler.org/the_collector_book_summaryfudmw.pdf
    • https://static.s123-cdn-static.com/uploads/4490138/normal_5ff527d3f161d.pdf
    • https://cdn.sqhk.co/muwazubivotu/Tgejgif/miweluluzizijogezar.pdf
    • https://cdn-cms.f-static.net/uploads/4365591/normal_604344ef0e496.pdf
    • http://remont-pc.website/30336950441aje06.pdf
    • http://naligixe.getenjoyment.net/business_process_modeling_example.pdf
    • https://cdn.sqhk.co/gafazakedoki/jiDXwgg/block_puzzle_jewel_download_free.pdf
    • https://cdn.sqhk.co/mapetidul/ncG6heu/19104360981.pdf
    • https://cdn-cms.f-static.net/uploads/4485703/normal_60321522302cc.pdf
    • http://zijafanovidiz.sportsontheweb.net/vopafisenizeme.pdf
    • https://cdn-cms.f-static.net/uploads/4490367/normal_60476a2419988.pdf
    • https://cdn-cms.f-static.net/uploads/4449622/normal_604a3f7092555.pdf
    • http://helpverifedbadges.com/dativunofujusidefu0f1eu.pdf
    • https://cdn-cms.f-static.net/uploads/4366341/normal_601aa2f1ae88c.pdf
    • http://tuduvodakep.mypressonline.com/dinebupiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4968a136-1106-4b4a-8595-9a0add611053/gekufib.pdf
    • https://uploads.strikinglycdn.com/files/826dc4d8-bebf-4ab6-86d8-ccf46e1be5c1/5th_grade_geometry_worksheets_free_printable.pdf
    • http://namakanexir.atwebpages.com/texas_instruments_ti_30xa_scientific_notation.pdf
    • https://uploads.strikinglycdn.com/files/efaad9b7-748d-48ef-8b03-0c31ddfbe932/ruletobofuwarudefif.pdf
    • https://uploads.strikinglycdn.com/files/97cb7b24-9ef8-4a7f-a3cd-1fc8566932c0/87771249652.pdf
    • https://uploads.strikinglycdn.com/files/b056f006-38db-413d-ae4f-566eba8e6e46/48515014543.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111f0.bin
74ef822cd885159fd824ddb8e2df6594c33f19d119e405495c8b4f1527b7decb
pdf-font-stream PDF embedded font (sfnt) at offset 0x111F0 5088 bytes
font_01_sfnt_off0001232c.bin
96269c9277e8e6a3826b9b65d6ac77bd5e2368450f761faa6be501de2364b0bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1232C 10548 bytes