Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bea368dc625fd80…

MALICIOUS

PDF

69.6 KB Created: 2021-02-16 22:54:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7992a4e0abe76cc656fa6c1d98db5f4b SHA-1: 1a75deef925776ea406095e5931d9f78d8ffdf27 SHA-256: 5bea368dc625fd80d1dd7a257576395289df4e1fd64e16eeac062f50be7b4d61
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, disguised with a seemingly legitimate query about financial calculations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests the document is designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/123?utm_term=how+do+you+calculate+debit+and+credit+in+excel PDF link annotation
    • http://afterdealer.pro/facebook_lite_login_free_mode_download_free_downloadrgoip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_600fc5d808a9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421959/normal_5fe29578873d2.pdfIn PDF document text
    • http://umdtheatre.ru/tumewaxosaroeldxd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5feff777666cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472216/normal_5ffa703c9549b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489717/normal_60078dcc686f5.pdfIn PDF document text
    • http://euromarket.pro/simple_electric_kettle_circuit_diagramjpoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_602117116b1d1.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/JvsgiMm/netflix_login_issues_on_smart_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369328/normal_60081ec40a8d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427538/normal_5fe48e4b380b9.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/jeponowon/xiniw.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_off0000d423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD423 5116 bytes
SHA-256: 0908047c76cd76110a871fa3b8ba5a5a5e88d645732e1f7e68216b8a86f7d971
font_01_sfnt_off0000e5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 10424 bytes
SHA-256: 4aa8ef100a9de2d783d2dc7ef8715c36fc70f22bc2f0b1e36728e5372876f619