Malicious PDF — malware analysis report

Static analysis result for SHA-256 729e4366c27805af…

MALICIOUS

PDF

59.2 KB Created: 2020-11-30 21:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e267ce858c889bcf9f2c0ec3e247911b SHA-1: 0a7502378ec1cfbfd789afd9fba43629dd02486b SHA-256: 729e4366c27805af6ad43fd5864b29b8920b3c5cc981d1e2719b18929a6f495b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a link to known malicious redirector infrastructure and a PDF link farm. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest an attempt to redirect the user to external, potentially malicious, content, likely for phishing or malware distribution.

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
  • 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.
  • 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.
  • 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://cctraff.ru/wb?keyword=solomon%20c3%20differentiation%20worksheet%20e In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f8777cd0e379.pdfIn PDF document text
    • https://zakewurez.weebly.com/uploads/1/3/4/4/134471700/8696111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5fb97cb9b1007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_5fc0f14611282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8b0b9281a19.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/degur_woxolu_zizejilasawed_bejuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449424/normal_5fb39c0517d4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_5fbed028d96e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f9454dcaf234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5f980830644ee.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/kalanejaxutilif/reruki.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/81604481562.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/java_programming_for_beginners_2018.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_off0000aba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABA5 5684 bytes
SHA-256: 4a4ac069ad2b74a47af81644aa2df17923fd0e7d090051ef84b9f56ebc03d914
font_01_sfnt_off0000bee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE6 9832 bytes
SHA-256: f0f4f98e2967e8d6917e17b527711617e5a14c39b480726b369effefdfcf0314

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