Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a7635a7119d989…

MALICIOUS

PDF

76.9 KB Created: 2021-03-28 13:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 89a8cd3e5f4a1b23ae98a8056a2fc6e7 SHA-1: cd7f81fb20e982198bd6f1b3e0969d0b2d6e57e4 SHA-256: 56a7635a7119d989ebb35f63c09624bb2c757d9e9531f7a8fce09d1f54ce793e
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 0.9998

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://soxebez.ru/award?keyword=basic+tenses+in+english+grammar+with+examples+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469136/normal_5feb89b6717c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_600cfece3ef81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420025/normal_5fdeb9b99a3a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464541/normal_6033668b9bc41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391037/normal_60046da1ac182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374013/normal_5ff19352878fd.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/15620876078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_603b26e15c21e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_603277ad6fead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470699/normal_604b9173c169a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_6015e4c98d016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_60530f764d109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_602b429aedd07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_601d34d941acf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5fd86169114b6.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
    • http://nivuzujanux.myartsonline.com/53161722731.pdfIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_d9caa9f269e04a2a92f1fca9420e3f47.pdf?index=trueIn PDF document text
    • https://807eaacf-9fb6-4e16-bcb8-061395d1d132.filesusr.com/ugd/a3ef2e_e6edc98cfb664fe8baf8cfd454d55af6.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_0fd419da8f474247817ad56f641dca7b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6D 5456 bytes
SHA-256: 6c68ae8712196b82985e79937c08d495d041bfc4f1138aaaee3e34d26942d223
font_01_sfnt_off0000f1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DA 10672 bytes
SHA-256: 4bed3bb27d06c6dd3d92612295639865855055062499b6a0280e8065ad36541f
font_02_sfnt_off00011648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11648 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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