Malicious PDF — malware analysis report

Static analysis result for SHA-256 467295bfa88dc08c…

MALICIOUS

PDF

68.3 KB Created: 2020-12-04 14:02:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 571169b1e9e672e4d7c414ee68d4a2f3 SHA-1: 345a1ffcb14542ca84e31aed5b3d167d2e4165b7 SHA-256: 467295bfa88dc08c99c0688541663b0a2901105455272db14acdfd2be3be9870
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm designed to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic firings suggest the document is designed to redirect users to malicious infrastructure.

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://cctraff.ru/aws?utm_term=personal+character+reference+letter+pdf In PDF document text
    • https://reborugavuzak.weebly.com/uploads/1/3/4/7/134736286/felamov_finawuxotuli.pdfIn PDF document text
    • https://xugilatopuke.weebly.com/uploads/1/3/4/7/134746985/fixokulepifu.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/ee736b022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8cef4dea36c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_5fa39cacd6f46.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/kuxuxemu/12893263885.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f0cad49dd12447345200/t/5fc51c203f75b1664376cb73/1606753317181/76173883595.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0efc3b8467722f1d478d1/t/5fc1e3983f75b1664318bbd4/1606542234395/ganthet_vs_superman.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc367917848ba205d2889eb/t/5fc4c9e3fa04221c71b66e06/1606732260426/original_jurisdiction_refers_to.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60130ba4-1edc-453b-9aab-fe2b43d48cee/79752043697.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11cf00a2757459be424fe/t/5fc2ae3618e72e5fdb2fcfed/1606594102853/vudowaxutaparoxezipi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e85027a199023ab5619d/t/5fc71fed8f0796361573f618/1606885357590/bimetijiweneso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6f7a381da8a590dadce4a/t/5fc9244abdf2bb7df9e96dec/1607017547472/pejesulunulomapavor.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/52270481300.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_off0000ce6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 5244 bytes
SHA-256: ef48b39c9da54bb60b473dd919691d751453950d532b2ce386c8673a915c1651
font_01_sfnt_off0000e037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE037 10376 bytes
SHA-256: 88a9324435e49ca66a1fa2f3a80c48e1f0561624272165a4c5e8203a9d6506f5

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