Malicious PDF — malware analysis report

Static analysis result for SHA-256 509fcd95740c9fc5…

MALICIOUS

PDF

66.4 KB Created: 2020-12-21 13:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 160752ebc0d4fdaf609a4e03ac9a891e SHA-1: 1717b07a3812087385da12901a704a7e3f28afb9 SHA-256: 509fcd95740c9fc5ecf2f34f6a9937cf4316a25e9b7c22aea2fa96ff55756d93
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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=change+hair+color+app+ios PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fceacf2cfbea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f8a8517d47a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413978/normal_5fc9f5fbf1991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5fcd31d58ecf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497359/normal_5fb255aa9f476.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/mogedozara/85862673763.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/95221305517.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/fly_fishing_guide_northern_california.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/adverb_and_adjective_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/sigolemufapemupojem.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/72942890065.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_off0000c8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B3 5100 bytes
SHA-256: 5a2b8db6a45531e6f9883e63e37c2662d1d895057a18809d24405860a4d51f7f
font_01_sfnt_off0000da03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA03 10260 bytes
SHA-256: 2eaaafdc305bcfd76a7c86ebcb8120d7eb5362899a4ccfc8aaa53221c732bc34

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