Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe4540d2a511432…

MALICIOUS

PDF

67.4 KB Created: 2020-12-23 00:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8dc6099c9b2fc367f5a73e9313880933 SHA-1: 6e349ec48c4baa5bd02ec8ec5a4c2693a23e926b SHA-256: cfe4540d2a51143238a818b06409f497e6e893d02bab679a8398211278e48fdb
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to "chemical elements science definition", suggesting a lure to entice users to click the malicious link.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/strik?utm_term=chemical+elements+science+definition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413987/normal_5fda736f2cc75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5fe17e5d9424b.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/b82719a7-a462-4d45-81e5-083050983d71/81764005703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbaf8190-744a-4d0d-825a-73a7d5c90915/44870078693.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6afd77848ba205d414585/t/5fc8d52626a3037b4345c13e/1606997286851/repost_story_instagram_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d26553-3ad1-463d-92c7-ac6f58759f3d/jesuvata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0535d32-4865-4330-bf19-6d28959baf3a/72711936992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265dd392-f86f-4ed4-83b5-713dc503b77f/37399050598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de141a1-43c1-45ac-a30e-caeeafcecc85/graphing_quadratic_functions_in_standard_form_worksheet_algebra_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae69d338-cbc8-46a8-b730-de1dc68e197e/2012_jetta_manual_transmission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc9db5b-0d1f-4cc4-8e6b-5d82d47c04cf/sejukewo.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_off0000cbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE5 5068 bytes
SHA-256: 2a9b0da6cd3b0e8aa66e0f8f3d40ab1032da3dcfb1e8632b004218a590cd0110
font_01_sfnt_off0000dcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF5 10564 bytes
SHA-256: b7e631404258ed622eed38e72f3c031ae01186e78e0d5977c84ed05b9d93b4d6