Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cc5efb5c262f3b…

MALICIOUS

PDF

70.6 KB Created: 2020-12-16 09:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 07b25c785a56969a16811f29234dac8b SHA-1: d890e14af487ebb17e20e5943aca1d8ad6bd39a2 SHA-256: d8cc5efb5c262f3b66ca215ed43079a49c87c03717422f8f17ca53cd4a9f7b25
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=dunstan+middle+school+principal'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=dunstan+middle+school+principal In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fd3d13c14e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5f98d0056e533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_5fa1ea140dc15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5f9b84b19464b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_5fd9b241602ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5f9522558cb2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f91d6f88e3b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc389b02cf09257bd7c80b9/t/5fcb88200814be4f73eacbac/1607174179126/rexusat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64b40bda9c57a97e2ea2d/t/5fc9ec1d196a600d3c351fa6/1607068702786/73077301778.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc145c30a2757459be55efb/t/5fd1bd04d97b572b89d9a90c/1607580938050/28953080454.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc174bfa5bc066edfa992ec/t/5fc3f05a9d79364840077dc3/1606676571496/10430028708.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f79e2e34347c7044618a/t/5fcc9768920f47545b8e7884/1607243625759/83393046911.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_off0000cad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD0 2904 bytes
SHA-256: c9ffeece383925ab9180d4db2f47f4d21aeea4915c0f25f4cdc467870b35cb17
font_01_sfnt_off0000d51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51F 5312 bytes
SHA-256: b9089eec1b06ec1bb6e6198b90dafff36f3b88ebdd35d0ccf081a4424423f203
font_02_sfnt_off0000e706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE706 11100 bytes
SHA-256: 9ae1d9a27a0cf0f1ae0bbe485f5e2ddbf9080cd9a1b598cf5bca982a24e44eac

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