Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67e5546bc144b30…

MALICIOUS

PDF

65.6 KB Created: 2020-11-11 20:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8fb57ed7a16340b84c3fb6453992025d SHA-1: 7387fd9e791b77ce01fd5f9d6b9ca736280f7d64 SHA-256: e67e5546bc144b301adbed712fc0edcb92705aa9d552d27c107387dd0d2cb223
214 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high ML score. The PDF contains a large number of embedded links, many pointing to external resources, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=song+lyrics+doom+despair+and+agony+on+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f8b99e9e7de4.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/4889151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_5fa86a80e3ee7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415308/normal_5f974770177c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_5f8f557d44286.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/9243522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f887b42006b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tibitexil/51035314778.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/lenex.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/les_affaires_scolaires_en_anglais.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/kumoleram.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/graphic_designer_portfolio_sample.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB777 5304 bytes
SHA-256: 1e827822ab2848d92b1cd25abd01012d7d12436f3e7c2f16318f730991d68c5b
font_01_sfnt_off0000c952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC952 9964 bytes
SHA-256: 3a19c9dd7fd223224c83cb1b0217d151db11d848609fcf7d4ffaf50386c9ffac
font_02_sfnt_off0000eb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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