Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c04554bde7f0de9…

MALICIOUS

PDF

66.9 KB Created: 2020-12-20 06:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 98385e5b8a5a0f9f9c5a5a93993ac685 SHA-1: b926fec113c5067d3ac77369526ada5a131f7741 SHA-256: 0c04554bde7f0de994c847ef9198311adc04b89aace56474f7a230e7c99d4b26
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-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/123?utm_term=fermentation+lab+report+microbiology In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477655/normal_5fd1c01151fbd.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/kusesovurizo-wutanagivafewo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_5fc099ae6bd70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411696/normal_5fa8057a00f3b.pdfIn PDF document text
    • https://zewobukepefew.weebly.com/uploads/1/3/4/4/134485556/b1b3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_5fa8d742027e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5fd3bdfac5e09.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/5fbe1457bc819f1cf4a08f01/1606292568507/wawinero.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d3b00b6b03258f353712/t/5fc54b2a18e72e5fdb8688a3/1606765355878/childish_gambino_camp_album_download_free_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b7ebed-5f04-4b0d-8ba8-934e13b11337/buku_kepemimpinan.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_off0000c897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC897 5272 bytes
SHA-256: d8fa40885dbe57e5a97eb6a5c3750f01e93700dd2774ac08109de42f597db967
font_01_sfnt_off0000da75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA75 10820 bytes
SHA-256: e80f3964f2602be67e18953b3809039ae51b28a8b36f3e7de6d7edbafd7c3760