Malicious PDF — malware analysis report

Static analysis result for SHA-256 73058ef5f9e88276…

MALICIOUS

PDF

70.7 KB Created: 2020-11-11 06:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 06d58530516af2c9d3349a785d0f3e06 SHA-1: 5fcac26b047d79fa2908a7dd05655127899daa73 SHA-256: 73058ef5f9e88276e4afbaaa595bc572d3c019fae0187885bc7e8623c473e99d
214 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to potentially malicious or SEO-spam related domains. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one URL redirects to known malicious infrastructure. The ML classifier and ClamAV also flagged this file as malicious, suggesting it is part of a campaign to distribute malware or phishing content through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffine.ru/strik?keyword=titleist+910+d2+settings In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f89325b27e38.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/pikumavow-tekedaropegafeg-gufurej-jenew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5f9d49537c1a7.pdfIn PDF document text
    • https://farupixin.weebly.com/uploads/1/3/4/3/134314126/loposoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_5fa8fb35acf1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f8ff97cdcc88.pdfIn PDF document text
    • https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/8792255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_5f95bbf20ad89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f87fe6e51e59.pdfIn PDF document text
    • https://xemivigezeb.weebly.com/uploads/1/3/4/4/134481563/3918857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f9248521548d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f9aed4b11b01.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/ruzumeb/xm_radio_app_for_kindle_fire.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_off0000d078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD078 5120 bytes
SHA-256: 3d008cb0f73647257aadfb5c4cadb960291d3590e8874ae1a795e38267425449
font_01_sfnt_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 13500 bytes
SHA-256: 89df8a4484ac46c36ec1b8d1b3b77f678df3e3c0b07211b093b4204134cb963d

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