Malicious PDF — malware analysis report

Static analysis result for SHA-256 0046d8e57923af6d…

MALICIOUS

PDF

77.0 KB Created: 2020-11-24 20:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: acfce88acb4b44b1a1224e8dfe3e47a7 SHA-1: 34025d3cb193d5798e7ec1bbd898a135d56d83ee SHA-256: 0046d8e57923af6dd913804e7da854af3e21b57945609f8bc066939cdfd89168
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, suggesting it functions as a link farm or a distribution point for further malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's primary purpose is to redirect users to potentially harmful websites.

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
  • 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://trafftec.ru/strik?utm_term=tamu+meal+plan+prices PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f90385c5b2ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407997/normal_5f92eb1a3aa9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5f9ce2fd66b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422628/normal_5fafa05f7dbfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5fb2c4696309f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f882d6d93239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5fa6a42daf65b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5f9bfb6cd75da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_5fb7edec8d266.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/acba796e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f906d2f7aab3.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/9536902.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/jeduzizonox/resident_evil_7_mr_everywhere_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/libros_de_camilo_jose_cela.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_off0000efb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 5028 bytes
SHA-256: 804728e567e8c0fe0900e5f1c951f43542a769b78166a76d5942b2c4f958668f
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 11288 bytes
SHA-256: 17fdee6282a8fd831d37d17e7e65abe7353895bdd00255ffc4304e8e29bbc108

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