Malicious PDF — malware analysis report

Static analysis result for SHA-256 6251d33b0531832e…

MALICIOUS

PDF

164.8 KB Created: 2020-11-11 05:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4ea7fe073ec1f71a2d8193c815f7b4d6 SHA-1: 91df304e9a697d98d5b4f32f85b8d8ff2d44f570 SHA-256: 6251d33b0531832e38ba479b620d3f02c368ebb5bfe4c1e8253feb2e4c0d7039
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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/123?keyword=wildcat+mountain+elementary+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8800fe91dbe.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/883107a8-782c-44dc-af41-13464703d176/kefijalizunubekuxam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955936b5-bc8d-4187-a512-7e022d6e43b2/tree_of_savior_dungeons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58dbf6a-041b-4642-9e58-2bbd8a218f7c/mizijideluximebototus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd9b37ae-f75a-4ce2-8a7f-e920a2f2256e/sipegiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c64829-523a-4d61-8cf7-246536474e32/sapelovewoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efbf0980-accb-4121-875b-0496317171ca/xumivibepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a38023-890a-45b7-b20f-a220e9192796/my_student_portal_keiser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4879c3-c968-4248-8be1-2c20a88a2c61/7166921877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3521ad3-b7c1-4233-9632-dcda652af2b8/xeselafixerafil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb748e30-ccf1-49a4-8eb4-c96713b97895/7896050495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c62b0781-7aa5-461f-a575-ffe5be3e2d79/55449440772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10946fc6-4f65-48c7-a0ed-2215b9cce9c1/dupabudagofamaline.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_off00024eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24EBA 5292 bytes
SHA-256: 03c443a9054f30ae19684f2d04cfe37fb1fa3cb33bfdfebc1adf25203f2a444e
font_01_sfnt_off0002609d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2609D 10788 bytes
SHA-256: 9122b2f72903c9c72aa8ccc4b3a6f44f4a3e645fb7d5727f296c4de5e7f91bb0

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