Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d89a25d3c632e7…

MALICIOUS

PDF

79.5 KB Created: 2020-12-11 09:23:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7ddff6f9caa61e0e88bf4ddc9c6b7e22 SHA-1: c767fb27b43195acfca5b97c0c05973f876523b9 SHA-256: 27d89a25d3c632e764825c0aa2f175ed908f5f3933a2faeab51c1d840a47bbb4
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=information+on+the+georgia+guidestones In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5fa7a0e4307fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f8d0026e9be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460247/normal_5fada6bd6aa19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387713/normal_5f8f09af8f9ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_5fd18dea017fb.pdfIn PDF document text
    • https://lexijodipegi.weebly.com/uploads/1/3/4/5/134510521/4285472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f91e4f947efe.pdfIn PDF document text
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/lajelika.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_5fb4642547ade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_5fa64a710946c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5fd09f692c27e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_5fb86da6000fe.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/7a9e53ef-c66d-4f4e-be35-d6d95b0798f9/danerebetibabomelu.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/kukuzenizo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2a3f4f98375720aa28f6/1606298176045/apollo_of_veii_importance.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06b0d2e537a05ef0695ba/t/5fc1108e18e72e5fdbfd1147/1606488207711/to_kill_a_dragon_mark_grondin.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_off0000fbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 5228 bytes
SHA-256: f5e9dd9eab5fe4026d30b2cd0b42b31a5be46d70746c4c71b708f68e99812433
font_01_sfnt_off00010d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8E 10232 bytes
SHA-256: cc5012d508145b8f39504949ad62d5502a72cd4ab13d2be46168ae669415f208

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