Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b683a73646c065f…

MALICIOUS

PDF

71.1 KB Created: 2021-02-15 10:49:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0db8be3d5ccd060abbd53f9bac738f81 SHA-1: c65ddc8eb9a864ec211328226c10ebe073217d14 SHA-256: 9b683a73646c065ff4912ee6665425e8d294d5bb85c72a2ad48dd7d6cf6387e0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of embedded URLs and a link farm suggests an attempt to redirect users to malicious sites.

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
  • 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://maypoin.ru/123?utm_term=seth+thomas+mantle+clock+replacement+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384655/normal_601a9ab142307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_60137fcd82dd3.pdfIn PDF document text
    • https://vefenebef.weebly.com/uploads/1/3/4/8/134885139/5688108.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485826/normal_5fc7bcc3b96f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_5fd233f215eaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417039/normal_6006b0c19b819.pdfIn PDF document text
    • https://musabonaxuzu.weebly.com/uploads/1/3/2/8/132815830/jadurideligajuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424666/normal_5fd1fce45ace5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426408/normal_5feed6603c695.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_600e3fc3364a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_600c903284796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484363/normal_5fe337bb0ff43.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/sitivexekaxiga.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/ad21802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77D 5340 bytes
SHA-256: 6672d6b60837c10a88ac45976e076933bfa8d5b96e5965a43d99ada7a6fb6c94
font_01_sfnt_off0000e979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE979 11028 bytes
SHA-256: df3eaed943fbb0628ac9d02e4e0dc9d501ae3116d26090ca9263c173a96d45ce

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