Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a873abfac405148…

MALICIOUS

PDF

67.9 KB Created: 2020-12-10 13:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5ddad55938ee2913da7e7e72276338c2 SHA-1: 29d258f8b0fc837a11b1cd29050cb02825f77b77 SHA-256: 4a873abfac405148a455a3f6a4f2182b410885fffb32235bba6d20aaf9ff8b12
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 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=blank+golf+course+rates In PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_5fbf22ba10e42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5fc348f2205c1.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/c5cf1a2c-5013-423a-8ffa-0a95ead0b746/45286770957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3781d62-176e-4c03-97bc-62e298ce0cb2/315855454.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/56186553116.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/99948392732.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b078418d7934ac789744/t/5fcb9fae8dcc5603bef7d971/1607180207628/wafexamugezevapuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e4b4d1-e7a1-403c-b014-2041a7205ffd/solujidav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b229d5ce-e2fa-4edd-8818-7dfdaf24d494/pregnant_porn_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6520b38-f9cf-4bf7-8d8a-84e07ed03d36/nomodibiv.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_off0000c913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC913 5164 bytes
SHA-256: 0f9851e1395a2b8365581289cd483aa0cebbcb1fbad9f3880112f4a03e33855d
font_01_sfnt_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 12504 bytes
SHA-256: be48959e947c57d563d081cd316f28b339afd460d32d5b80cff732be4e1b0d30