Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed37d4c0541c6a9…

MALICIOUS

PDF

77.4 KB Created: 2021-01-24 02:35:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5bf1f3c04fe22e15415a4f8b45a52e72 SHA-1: 8c9a83cae9286ebbcf50bbf67515a1fea728534b SHA-256: 5ed37d4c0541c6a9f9ae7f6f30d5e879035e389988210bb4ce536e9114d9ef00
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to 'leonvi.ru', which is flagged as a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of an embedded URL suggests an attempt to redirect the user to a potentially malicious site, likely for credential harvesting or further malware delivery.

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://leonvi.ru/aws?utm_term=free+html+template+responsive+bootstrap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487902/normal_5fdac6b7f4148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485580/normal_60017c79448aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371787/normal_5fcc9a6e247c7.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/gijepoxubizorukugata.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/dIiajih/44085123548.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446643/normal_5ff8dc1e2895b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464080/normal_6004b0f575b5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491412/normal_5ff9259387487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462035/normal_5fd85bb38539e.pdfIn PDF document text
    • http://rabisoluvilava.iblogger.org/tatalib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newurefaz.epizy.com/boneshaker_zinfandel.pdfIn PDF document text
    • http://wavedada.epizy.com/60013781750.pdfIn PDF document text
    • http://bufalirafuma.epizy.com/todogikisudegofokupopa.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_off0000f31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 5212 bytes
SHA-256: a84308337c47f7f7429791fab5cbb5db613a9ac714fb6205ea199b5ae9bcd2db
font_01_sfnt_off000104a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A9 10620 bytes
SHA-256: 55f3cb13400b326ff7fad16b84e88eeb71d3cd90c177ed9c0a44c761bb756e48