Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25636b91853ec90…

MALICIOUS

PDF

83.5 KB Created: 2021-03-05 04:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 19d5ff15d5d8595a057a043603626c27 SHA-1: 9f6003ad7bba85db2ea0372cc2525d55995abf5d SHA-256: e25636b91853ec90ba87d8a3e301622823177cf0caf4ef2e93ebc30879afdd49
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 0.9996

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://seumenha.ru/wix?keyword=bleach+vs+naruto+2.6+unblocked+at+school PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450256/normal_5fc8881cf2aad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_60400a401485c.pdfIn PDF document text
    • http://imkl-checker.com/27954892964xhahz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422385/normal_6006b89ac8a32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371261/normal_5fcb0ef7ef2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_600da2a28ba0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fc84b7ab99ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449410/normal_5ff046d8cbbf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448746/normal_6022676d1bbcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413719/normal_5fcda7a060680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464053/normal_5feee7bddc1bb.pdfIn PDF document text
    • http://gmetry.online/4196235747873pgx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382772/normal_5fe02a8d64693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fdd3f87f2395.pdfIn PDF document text
    • http://werenntaq.online/66427150711fbpu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_5fea3656e4fc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5fcd960c8c8a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5fdc433b7096e.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://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_00267fbc65bb41faadeb4db7a9bd17ee.pdf?index=trueIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_8ed6f288dcd54f6c97690f7ed9b3a522.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 4240 bytes
SHA-256: d914234769972a8dc8f3d8b4ba0abfbbb2a2b30f6be07940a4b996f81746bbdc
font_01_sfnt_off0000f45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45B 5492 bytes
SHA-256: b67127e126ce6273e82d8e1652fbd08977263b9d0d0de9e90703f60fc0a6d893
font_02_sfnt_off000106f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 14024 bytes
SHA-256: cd6676eb098c30d66666bae8409ce584a87150b18b5cd421fbee8633b490cbc7
font_03_sfnt_off00012fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEE 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.