Malicious PDF — malware analysis report

Static analysis result for SHA-256 257569eff0ab0dd8…

MALICIOUS

PDF

67.8 KB Created: 2020-12-06 15:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ab5f92dcffe4e7f549097b52f9ed52b6 SHA-1: d8e3f5f2d0c37affa305405fe4502448ea94f496 SHA-256: 257569eff0ab0dd8ab292dcf40df2e0b93299485f66e345f4fea3390c5435e2b
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 0.9998

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://cctraff.ru/strik?utm_term=ck+100+key+programmer+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5fc0bdc4b6e0c.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/3ed38b78-332d-42b8-b63c-a89136636385/jibunejupitufubowi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3aad26ff1194f72fc70/t/5fc1fd5c4e98326c0256f659/1606548830683/disitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01db6cd2-3472-4157-8cdc-4500fea64533/66022899295.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc285d364571256548de2ec/1606583766906/research_methodology_kothari.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b498e9fc3622d52dc1d8/t/5fc4d7266457125654d3f246/1606735658999/seminole_county_ga_tax_assessor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19c63ab-461b-493d-aa1c-761bc634f0df/curved_arrows_png.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/amantadine_hcl_davis_drug_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6685b3c-bdfc-4a82-af1e-4e98eae0b0a5/21_lessons_for_the_21st_century.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64c582e537a05ef2dcca0/t/5fcbfd585d2e6f3bda277898/1607204184691/bubble_freedom_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfc0cfa04221c71e6c0f4/1606286348734/51515662072.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_off0000cc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8A 5448 bytes
SHA-256: 7e310a90aa016cdbb6221d2c680e273bc3fbefecd54d5c6c74250d98804a9c3f
font_01_sfnt_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 10300 bytes
SHA-256: b3e1e2a82e0e5711b361970020b9385a9059454bed162ab8c57a09daa5a1212b

Open this report in the interactive analyzer, or submit your own file for analysis.