Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d3ff76e3851dfc…

MALICIOUS

PDF

87.9 KB Created: 2020-12-14 19:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a682a3b76cb67324240c7b07e0669a1f SHA-1: 16f055057407c427705adcd32de24a55e9b89f28 SHA-256: 16d3ff76e3851dfcb6a8981f68240dd8b091275bcdd76a580c196428550e71b5
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL, https://traffset.ru/123?utm_term=wicking+raised+bed, which is the primary indicator of malicious intent. The document body is heavily obfuscated but appears to contain the same URL, suggesting a phishing or malware delivery attempt.

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/123?utm_term=wicking+raised+bed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443802/normal_5fb757124c48d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_5fa738dcc05d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491433/normal_5fbd53960991a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_5f8ec419ea75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5fb038c4b8c79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc53768bf71053ccb2bf618/t/5fc9a2b76a94db17e48c25ff/1607049921548/45698095958.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a79ef9866f3fd2f451a6/t/5fd1bb7b871f8c6e595b9134/1607580542983/camera_app_for_pc_windows_7_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce51635-81cd-4ae3-9bb4-6213cb7c0673/kufobowizejupow.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce984ae57e2d6c64338818/t/5fd6097c89566e781f458915/1607862653054/36497966714.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15943ea4a794d56482977/t/5fc371db4f983757204bde83/1606644188032/ghost_whisperer_episode_guides.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ce31d26ff1194f9586a7/t/5fc81314217b3604edcd30d7/1606947605908/satarulilif.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1961a60f2895dc1ecb911/t/5fc6633918e72e5fdbb26cc1/1606837051975/f1_manager_strategy_series_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76550c6f-2a7c-4f84-bac4-52e62c8a9c91/papivizasiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd49cd47-57e2-468b-b739-54a3ad9f943f/xopekanowefujud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E24 4892 bytes
SHA-256: 8132e58d33b36a08314434b5d75945cede4a4aed2063772989812be034123cb0
font_01_sfnt_off00011ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC8 11068 bytes
SHA-256: b0f9e3228fd3de898908c54967204a9445f2891c805f087195892dc6e04f31aa
font_02_sfnt_off00014473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14473 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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