Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26a90c130265929…

MALICIOUS

PDF

80.8 KB Created: 2020-11-24 23:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 87c590948e63db53726157ab36be3afe SHA-1: 7c7aaccff7fcc82a00c77f356b291d9c1693a5e0 SHA-256: d26a90c130265929f409aa0456780b07d29addba854857ad68639bf9246514e8
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector and others forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the document structure itself is designed to drive traffic to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=equality+of+all+persons+definition In PDF document text
    • https://xemaxokiba.weebly.com/uploads/1/3/4/3/134350412/lipezoxegapirugabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5fa0c4ed6ac77.pdfIn PDF document text
    • https://fivakamine.weebly.com/uploads/1/3/4/3/134384559/bbf9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_5f9ba50d115f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_5f91cdaee0277.pdfIn PDF document text
    • https://domamulobam.weebly.com/uploads/1/3/4/5/134527142/eb98744d79057a.pdfIn PDF document text
    • https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/sugujigike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_5f9c9357d69c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f89871bf02e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5fba484437658.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/leroxaxisejuburukaji.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/48ec088b-51f9-48f7-a775-5bcc0c06b749/lamisegabiludibuf.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_off000101a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A2 5220 bytes
SHA-256: 62deade414a45c43851fb0cc0a29f9afed6fb9bcfee514e186ed583aa1a69f9c
font_01_sfnt_off00011381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11381 10188 bytes
SHA-256: 8842bc47b56d0bdeedc9beb0e57080587c1d7365d1b66bc8c7f47012fc87155f

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