Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ee2700beeaef68…

MALICIOUS

PDF

72.3 KB Created: 2021-02-18 17:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 61e4271364a74367c0cbb95b420ba2a9 SHA-1: df018b79385c7cc633752a038fcaee027e43de9a SHA-256: 57ee2700beeaef6838dabe62988128dc02f6b70c6c1613984bc6e39024285afd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for job seekers. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of multiple suspicious URLs suggests the document is part of a campaign to redirect users to malicious sites.

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://druttle.ru/wix?keyword=cover+letter+for+usps+job PDF link annotation
    • http://amsidgi.xyz/base64_to_image_javascriptoims3.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/jjdBjGg/rexapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496602/normal_5feb973d20191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_602039a308224.pdfIn PDF document text
    • http://opit.space/grizzly_hills_violin_sheet_music77pxy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_6023f069d2edf.pdfIn PDF document text
    • http://social-whisper.ru/hipoaldosteronismo_primario_y_secundariouz0hi.pdfIn PDF document text
    • http://tikovg.xyz/kagipoxedisel9l579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_6017b75571be2.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/genedonapubefe/email_marketing_templates_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/26270099873.pdfIn PDF document text
    • http://bekovomojuto.epizy.com/82580637880.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/55942307264.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/wemososisopenidumipapuk.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/pejobi.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/java_7._81.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_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 4864 bytes
SHA-256: f97fb3aa89aac21fadff0b0580c719e97fbd48ab35f5796a44d27827ebc7601a
font_01_sfnt_off0000f235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF235 9888 bytes
SHA-256: 94176f6f5d6b17e021f27f3bc4e934e1adc89f1f1ab0dfba081bc3dea2babbbf

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