Malicious PDF — malware analysis report

Static analysis result for SHA-256 2479f1761bc3ab31…

MALICIOUS

PDF

59.3 KB Created: 2020-12-03 20:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d9cf18ef918563eab5f54668e366df73 SHA-1: 3fdc37ca47736867b5aec09d6c99fc5328d763bc SHA-256: 2479f1761bc3ab31b6ea9617060954d6e7e85b190cdae044533c63525dc755c1
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 0.9994

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://traffmen.ru/wb?keyword=dingbats%20quiz%20with%20answers%20printable In PDF document text
    • https://static.s123-cdn-static.com/uploads/4382620/normal_5fc54ddccf451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403561/normal_5f91cf51d4ab2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412195/normal_5fa41e089c80c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_5fa3bb97abfcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412908/normal_5f9d6eef09c80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486987/normal_5fc542373f181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5fb979abaff97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5fadfadd5e127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f8711d254a94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd080d9d104e5f152f4518/1606223890670/90156667228.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_off0000abdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABDD 5488 bytes
SHA-256: 0dd191c14ecf115082b3bb054f8b19aa6dab598a87a856e4c9da885db0c108cc
font_01_sfnt_off0000be9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9D 9968 bytes
SHA-256: d5863a5b65f35bc7e2ef933074ee1201bbfc86ee56ed097e612aff78578d3920