Malicious PDF — malware analysis report

Static analysis result for SHA-256 945d3de3f383cadc…

MALICIOUS

PDF

66.9 KB Created: 2020-11-27 22:36:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 456aebbe71d5808e40b536737fdad4d8 SHA-1: 97f06c7b60e232c4dbc7b0978ee0447887d6394a SHA-256: 945d3de3f383cadc9e8314723c1cf53deebd1bc1a503c5d872e5e46672dc7892
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 0.9995

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/strik?utm_term=fat+diminisher+system+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418368/normal_5fa77e33316a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5fa2e0cb815d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f9f556aca848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5fbe8c293813f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_5f994b66d2345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446634/normal_5fb339ead4467.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezetega/jedimigujokugululalaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad3eea1-6ddf-492e-805a-8fcc2be60e3b/majubuvumafav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1339511e-d5d7-4b40-a664-e9c4febd211f/30579244244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e7b5927-66ce-4c80-bbd4-75f86cb191de/strategic_market_management_david_aaker_download.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_off0000cb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3C 5304 bytes
SHA-256: 9bd0a3a6883b9ac7f92466f34d247f8b65e2841946811254b029cd8c7bf6c47f
font_01_sfnt_off0000dd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD27 9968 bytes
SHA-256: 276777e38b0e0e51dd4bd6c151a80b0731d6738664431d0f5f6e8ebf3270d86c

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