Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0bbb059b0ffd2d7…

MALICIOUS

PDF

68.1 KB Created: 2020-12-28 19:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eced8eaee25916b06c03abe41646003e SHA-1: b59e0262927baa2b5538292004d611ef7cc33222 SHA-256: e0bbb059b0ffd2d765433f492947656408b42ef4821e56f04475ea6802168bdb
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this PDF is designed to redirect users to external malicious infrastructure, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/strik?utm_term=story+saver+apk+download+ios In PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/4b066a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425738/normal_5fbeae1e3f632.pdfIn PDF document text
    • https://taneromujek.weebly.com/uploads/1/3/4/6/134611199/4856297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447084/normal_5fbc84a3994cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5f91578aad447.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/hijhTyd/walivuwezovuxewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393639/normal_5f921543c5fee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fa9c3afce8ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5fbdbce295680.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/46ea0e71-9d62-43ff-97e7-3fc7fb351a9a/22955166313.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_off0000cceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEB 5376 bytes
SHA-256: 128dd6f50372925e720c0234728c3fd0f5ba41c9f1707cdb96dabc791cf6e041
font_01_sfnt_off0000df5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5E 10732 bytes
SHA-256: 7ade1c71dfebe42be5368a8466e6d76299eddf8518dd452546c3fb2bc398e298

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