Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1275269abd2805e…

MALICIOUS

PDF

70.4 KB Created: 2021-02-13 09:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 255ed12c2225590212086089ecfcfdf5 SHA-1: 8d038ef019459f9d43184cf2f88ae715122f06ae SHA-256: c1275269abd2805e2bf9e05129b0e46447da23f8571fbfa0f0e6110a4479fd22
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF link farm. This suggests an attempt to manipulate search engine results or redirect users to potentially malicious websites. While no scripts were explicitly extracted, the presence of external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=different+artistic+mediums PDF link annotation
    • https://sijokazodile.weebly.com/uploads/1/3/1/4/131454207/7075790.pdfIn PDF document text
    • https://jedagafigi.weebly.com/uploads/1/3/1/4/131438055/metuxotituderebaman.pdfIn PDF document text
    • http://scm03.ru/klingon_hamletznu1g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457573/normal_6014857e4ef76.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/melaliwofolur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426080/normal_600512b97037a.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/Xibcbhi/59307206609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374379/normal_5fc72eda1a426.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/6629472.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/hihheWY/served_synonym_noun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455684/normal_600ab00a59fe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5ff2d9205cd5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490269/normal_5fe91cad0edd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409394/normal_5fc56d5745853.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_off0000d8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A2 5132 bytes
SHA-256: 208fd84dd7c7fd1b6f182e15b231273aa3ac5798f43e0911b62fa8c0fe36f093
font_01_sfnt_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 10196 bytes
SHA-256: 42e817bb8a3e721979e98d3768d091acab14d6bccc0cc9142f1dcee7a4c9c559

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