Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79b2b537d399070…

MALICIOUS

PDF

69.3 KB Created: 2021-01-02 12:06:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c01d9243a1c18cdc277b736e7191a5a2 SHA-1: c776902484cff8fca0c1440f136c392e71256dc2 SHA-256: c79b2b537d3990709b7e11f79754e7ed28ff9ad451a38b9cc784e0e83de00330
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic and ClamAV detection. The ML classifier also flagged this PDF with high confidence. The embedded content, though heavily obfuscated, appears to be part of a lure, likely for phishing or malware distribution.

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://traffking.ru/aws?utm_term=best+love+quotes+hd+wallpapers In PDF document text
    • https://zeleloda.weebly.com/uploads/1/3/0/7/130776222/zoriwuw_sedoxuke_revisunagaj.pdfIn PDF document text
    • https://cdn.sqhk.co/lezagononek/dhfzjct/83249721596.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417530/normal_5fc7cb677fdc1.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/ghhjggP/19501915010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481064/normal_5fec4ea2f25b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_5fb3c49dc836b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5fa66b283b945.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/jepavilutabilel/argumentative_essay_topics_for_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31e51e6-f641-4ae1-bc14-d89fcf788e00/nebirepuluguxogukimepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8184058-4367-45b1-bfbd-e9b854e6f126/2247546868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b1a145-7783-40ed-9a6c-b6b3b8b47809/22576510114.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_off0000d2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F3 5376 bytes
SHA-256: 4ae9d919e397480c70b3fe72fed2ac502ff38e968a1fe4078569a579102dda42
font_01_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 10396 bytes
SHA-256: 6ab06c7c3bb717b029391dce6160fcca931a48b2c41824afe1a39c3780d64f8c