Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fad780e24dff9a5…

MALICIOUS

PDF

65.5 KB Created: 2021-01-06 12:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: eda93ae94d14c366d0ca3f6e2591d403 SHA-1: 7cfbcf629f8c0e5a522367cdf7d97d540721b931 SHA-256: 4fad780e24dff9a50167fd51faa72b609b90a530a3c8734e166b83df3a6b83de
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, indicating a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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://traffking.ru/123?utm_term=whale+talk+sparknotes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5fab5d65b21e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5fce2cbbbc8f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456387/normal_5fdb226f66f01.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/c373f676-7936-4edd-8f1d-2813601fcb65/mojolerofek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e254fe69-11f3-44c7-b51d-5801544dbd3f/60785892952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b48b16a-038f-4abc-b1d0-3278ed4080d9/kenny_s_window.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/487102267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0d4c1c-4997-465c-8edb-e0a374b72a4c/18854332485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2efd9e3f-428b-43b7-a50b-2497d6e2c95a/apne_movie_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e770b7a2-09d8-402d-b9c1-de6a8daed861/8236759347.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_off0000c77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77B 4984 bytes
SHA-256: bc70d2a1fd205282d0ad8ed0039ded83014051a0f72c47acd4ee2e69ce463c99
font_01_sfnt_off0000d86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86F 9900 bytes
SHA-256: 40ba0fedf209d9460bbbe63ad34009ab48c723078bedfd0f2ca5d7c7b6c59936