Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9f5126d7807d76…

MALICIOUS

PDF

60.9 KB Created: 2020-11-14 16:25:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bb8a7e0d38ef5b2b0aa449fe6d535f63 SHA-1: db77ab3e61c73e88f5e96f78132b985ddf411ec1 SHA-256: ed9f5126d7807d762007e947bc2a67efcb1f4de7d7cd10f4136182bedfe8addc
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=shark+watches+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f91ba3a7ba44.pdfIn PDF document text
    • https://regumalewa.weebly.com/uploads/1/3/4/6/134694163/490bc828c98e646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f885f4d41cdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5f90adb9064a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5f8a7703d1086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f9acb32d70c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_5fa005c2f3faa.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/negebojop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_5fa9ac944f45f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485929/normal_5fa84de961a13.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/307c5d487cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/983af4a7-6749-42d6-962c-33c7f33187fc/pemobemenogelopakuxug.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_off0000b2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E8 5296 bytes
SHA-256: 0d92fbca8447e3a35ac2282d77d19019fc088d471829904c486e3ce79054182b
font_01_sfnt_off0000c4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CF 10176 bytes
SHA-256: b5a993a4e3d0ce12c2055ed78f1c551b8b656d28bbe26ab15690db8a7a14c82d