Malicious PDF — malware analysis report

Static analysis result for SHA-256 228a643f5aa447d5…

MALICIOUS

PDF

68.8 KB Created: 2020-11-10 11:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8390832cd8444b9b1f0f64bfabd34d3b SHA-1: 7d03e8b06bbc908f6f85dd20c788917ccb5b46f9 SHA-256: 228a643f5aa447d52fc5293f924eb7dcf17a37fd99f13c0d6e111292ada892c9
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of numerous external PDF links suggests a link farm or redirection strategy to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?keyword=tropic+of+capricorn+henry+miller+pdf
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f9400041ba6d.pdf
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/rugifiwuxipilede.pdf
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f90097cd1bdd.pdf
    • https://cdn-cms.f-static.net/uploads/4450896/normal_5fa7c62445d89.pdf
    • https://cdn-cms.f-static.net/uploads/4409417/normal_5fa0c321dd10d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/0e486d64-4c94-4b32-8e0f-b358d8bc829b/suromiwafabuleramuruti.pdf
    • https://s3.amazonaws.com/pazovugal/97985989931.pdf
    • https://s3.amazonaws.com/gewuwasi/junadavi.pdf
    • https://s3.amazonaws.com/serogajugomiji/fifusodow.pdf
    • https://s3.amazonaws.com/megulu/fexuwe.pdf
    • https://s3.amazonaws.com/bubodeliza/burojule.pdf
    • https://uploads.strikinglycdn.com/files/1b014c48-6c83-45f5-b1db-40054cb4ff41/24752754074.pdf
    • https://s3.amazonaws.com/betefowubevat/lonolo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4e5.bin
767a5d72bface1fcd908263703336af78a3c6ceb2f16f0cfd176e34038ca3a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E5 4976 bytes
font_01_sfnt_off0000d595.bin
27b5e5c84d9c5ff0efd87b6acf0af7af6fa46f57dcff5cc884efe320c99e85ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 10156 bytes
font_02_sfnt_off0000f85c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 4324 bytes

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