Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfeec07266e902e6…

MALICIOUS

PDF

72.8 KB Created: 2020-12-22 08:06:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0660d9e9cb3bd0318856abe5824c30de SHA-1: dd65d8bb8a5bcd367cc1cab27f9d59a7b591e27e SHA-256: cfeec07266e902e66a6b55cb107e3a3812f90024232ec5615f271df9a7579161
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/strik?utm_term=mr+bullet+spy+puzzles+apk+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5f8c1d2ad0bf0.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/gekis_rajud_piteget.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412165/normal_5fcb20c1386ce.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/be402923e4.pdfIn PDF document text
    • https://kinoxumore.weebly.com/uploads/1/3/4/4/134463035/79ecfc00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f89206946ab8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_5fd935067b19d.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/7c9e9bc8-b7c8-4b60-b78e-0c11a5fb78b4/82844938227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a030ad4-75c8-4fa6-b12b-c2ac9c4373dc/81159952290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857d9e4d-8ecc-4371-a204-947917f0794c/37975902464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ff39c4-99a3-4a99-b75e-dadf435938d6/sozimag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e72f1b-0a74-44f7-abe7-c4afa3ba9724/ludupitadufofipiwejupinej.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf45c00f7af3919d2c79f/1606218844745/91437843706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dacc24be-e742-4b77-a7bf-feca9c5058c3/8277164686.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC87 5464 bytes
SHA-256: aecf57b176f8387bee2d4a1d41c92a1554602a6ba42bffed52cfc75557ac5e31
font_01_sfnt_off0000ef1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 11616 bytes
SHA-256: e02f7fb8be924e4be4a95834b3e897d1761afc165308e4381216221f81881b8a

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