Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb17390c5272ebf…

MALICIOUS

PDF

67.7 KB Created: 2020-12-31 11:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f81b6abfa3e1dda84ca33b57af3cbcb6 SHA-1: e4a9c1b92aa107186aab4be925fc824041b4f05c SHA-256: cdb17390c5272ebf48acff55e9f5e7e4b087380b3b30c2b3706f58e5cb0f28f8
96 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 embeds external URLs that direct users to attacker-controlled resources. 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
  • 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://trafficel.ru/123?utm_term=nano+definition+biology PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f89890d9b311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425230/normal_5fb35268787bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fc7297504137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f9e5cac16a7c.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/26drQjj/tawiwimosukosapo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5fcdd35aaa9d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417040/normal_5fc2b713226bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446395/normal_5fcd0ce14ad67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379984/normal_5feb1a7ca5a51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491398/normal_5fbd0e271b601.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402948/normal_5fdd86d53886b.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/33cbd145-7332-48e0-8066-53d0a97e3dbe/information_technology_project_management_schwalbe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a1088b-348d-415f-8f00-10ad4fa187f5/william_b_umstead_state_park_fishing.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_off0000cc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC67 5012 bytes
SHA-256: eca22172b7d9baa669f873ec34eeccc524856f39862419d41521673f7cc5955e
font_01_sfnt_off0000dd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 10848 bytes
SHA-256: 5566af1a38871becb65054086d4308770a81ed31b550e45fb70018b0a7670ce7

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