Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae550a60d7b0418…

MALICIOUS

PDF

68.1 KB Created: 2020-11-26 00:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4dfb78d66d3660cf0de73ab75eba06da SHA-1: 1471e4a212dbb1b05ebc8ae9b5ee17fb9c47815f SHA-256: cae550a60d7b041843bb60c9f5a1df2cd0fb50d6808335f480586b152120c5f4
154 Risk Score

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?utm_term=google+play+redeem+code+generator+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5fb9ebc1de27b.pdfIn PDF document text
    • https://gajorimimexawi.weebly.com/uploads/1/3/4/4/134458849/zapukopitufisesuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5fae2b74296bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8c574630d8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467581/normal_5fae69d8c6a99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cfecfc7-c55e-42b3-8b30-0bb76440ea61/wwe_champions_tier_list_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431510b8-1b45-41a3-bd35-6a7721d42ddd/rawavowanibewamonone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c0f6c52-7eba-4c89-b329-8bbc312161c4/97411490142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870cf0ea-cdb7-449b-b5ba-4c9a1dedcbf5/nipawavizokonekolig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd81ed6-71d4-4311-a5b1-e4614b899427/96084313720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b00baa9-ee84-40a6-95cf-09b2dec1eb3d/30754586827.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/lawubazudizixisumize.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_off0000cbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB3 5828 bytes
SHA-256: 8f042b88c6d8ab1d21e19bbd11c73a00b078367c0d93437b3b37b5fe49e17112
font_01_sfnt_off0000df8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8B 10544 bytes
SHA-256: 6524788253ef88b76b359770528f63ab3fa91a0cfc2a1e814266bfcb3187c075