Malicious PDF — malware analysis report

Static analysis result for SHA-256 a800e7c00f62bff6…

MALICIOUS

PDF

65.3 KB Created: 2020-12-14 22:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f65bcdbaa9c7f2e53289d9efd339a219 SHA-1: 90863716894c5ab935a40535b87f28c777a96a6c SHA-256: a800e7c00f62bff65df43cc37cf25908987d87f91cd8fe8904159cb7253207c3
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=glass+shelving+unit+for+bathroom PDF link annotation
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/e0ed9f2a1.pdfIn PDF document text
    • https://rusezoxebob.weebly.com/uploads/1/3/4/3/134355184/rusak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loneminovu/58542516599.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/free_email_newsletter_template_for_outlook.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/the_terms_of_reference_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/50010229641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83786ab7-ef44-4f2a-b1b7-fe640b746f5b/sukhmani_sahib_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/birugevepu.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/bomiteluroruwoxowot.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/93532600665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0edb2e5-b16e-4a17-9a03-12eec153223b/filawobekuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/244887996.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/juana_la_virgen_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/gamutipogalovonivejojoja.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12df85bcb0228a284406c/t/5fc395c91972c46e3c0c5815/1606653385421/padepusadajujulezaf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC211 5412 bytes
SHA-256: 6c214ae9590c839b8efc13cde4c91a95db1e25ef9cd19acb7aba3fdceb701ae2
font_01_sfnt_off0000d45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45D 10528 bytes
SHA-256: df5adbadbda46774eec8e84a010ab11fb6fe6b42002549d4c9738f2e9160242e

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