Malicious PDF — malware analysis report

Static analysis result for SHA-256 287556447ec382ba…

MALICIOUS

PDF

66.0 KB Created: 2020-11-14 20:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1a36ca29c3d5c1b8dcfb39ac2e05b9b6 SHA-1: 16d071267872782093959b0c300165a3874974e9 SHA-256: 287556447ec382ba006c1a35f96ce69cc159b166028b038ec2f099805fcae2ad
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate this PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of multiple external links suggests an attempt to lead the user away from the document to a compromised or malicious resource.

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
  • 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://traffking.ru/strik?utm_term=trail+dans+les+vosges In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485698/normal_5fa86ee24917a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f8e78297c2cd.pdfIn PDF document text
    • https://gozozogedabasiw.weebly.com/uploads/1/3/4/3/134321967/vezegakotikulov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_5f959cb6237ca.pdfIn PDF document text
    • https://jidugurulepapol.weebly.com/uploads/1/3/4/3/134310086/23f7cc94.pdfIn PDF document text
    • https://bugadubotureje.weebly.com/uploads/1/3/4/4/134468403/a4937d144.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/f8981c822c9cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5f8cfccc2c75b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_5f98f08242088.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/zibenoroduzuw/94129923409.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/81190505599.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/7481461321.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_off0000c2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B1 5000 bytes
SHA-256: f72789d7b0c80dacf6b8208e6111b3e449368ed58ca96193d9414baed9c57b0d
font_01_sfnt_off0000d3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C7 12144 bytes
SHA-256: 1066bcf75d921ba84f356ecab2f45ae5753d373e66d1c1dd4f2ea066a3c29df8

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