Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca4d5db33ba1d42…

MALICIOUS

PDF

70.0 KB Created: 2020-12-21 15:36:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e3008d77109e3e2022a0eefa80032022 SHA-1: bc7c2e9a940aa3d9bc74fba65b296e8c1f1e63ce SHA-256: 8ca4d5db33ba1d420613cc91b90eddfa592fe6aebae7c1a31c41c3286f09fb40
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 0.9997

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://gettraff.ru/123?utm_term=every+good+endeavor+book+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fbbd11a00bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5fd269eff14bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407301/normal_5fcbf59fe103d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5fa056ca4ebd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_5fa1ecb091a40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5faadff0286a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_5f9cc2287b5b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fb58ef3aefa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f89d5ce45d40.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/5fc0fa26e2fce462bc8c54f9/t/5fc545df3485235c8673bcbb/1606764000264/nematocera_vs_brachycera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d54748a-cf6d-432f-bc57-3bfcabf9566c/94866839652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/745f1c3e-31be-4308-867c-d522d1842bdc/jekunudadulamos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce9b3c10c1b611335f41c9/t/5fcfa8fe7cc0b10a0adaf067/1607444734921/vizizuvanapuv.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/kofomiribatemat.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_off0000d56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56A 5196 bytes
SHA-256: 0c29a3ca16f2336a9488493ee74e2d4aaec40ad847a3f997c551c3ae1efccef6
font_01_sfnt_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 10552 bytes
SHA-256: e64236342a7d4f3bd01dd33db8d6a83a4ad7ea43be0e9c155c2f3daf28668c22

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