Malicious PDF — malware analysis report

Static analysis result for SHA-256 7023254c6dd57723…

MALICIOUS

PDF

63.5 KB Created: 2021-02-01 06:29:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b25c6ced011ffc438748024200b3c00d SHA-1: 9638837619bf2dc5f27be8a1a3ae34a438d10fa3 SHA-256: 7023254c6dd5772306558d3aca4c6df1a4cb62c9cfd759529099dce3467c569d
154 Risk Score

Malware Insights

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

The file is a PDF containing embedded URLs, one of which is identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple obfuscated URLs suggests an attempt to distribute further malicious content or phish for credentials.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=back+loop+crochet In PDF document text
    • https://cdn.sqhk.co/sisadenev/hZzhhWE/36459880248.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/ieI4iaG/72968136183.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/Zhgingf/colors_that_go_together_generator.pdfIn PDF document text
    • http://zvezdasevera.online/kalotue7mi0.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/jhelXid/keen_commuter_bike_shoes.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/TAghhcN/android_radio_app_without_internet_connection.pdfIn PDF document text
    • http://fasad-dom.site/cat_cpi1000_not_workingm25w7.pdfIn PDF document text
    • https://cdn.sqhk.co/titolegun/fifjeK3/wekisepu.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/hcrfgd4/52962743340.pdfIn PDF document text
    • http://podipotekoi.ru/musica_de_adan_zapata_mixf5tmz.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/TFFghcO/hachiman_anime_season_3.pdfIn PDF document text
    • http://soldatskaya6.ru/kikolevaxubojubulojthg.pdfIn PDF document text
    • http://uscovidcharts.com/17205004993u759k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000be57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE57 4956 bytes
SHA-256: 04e54bc4747f15d51cf2d78adefe5fbf550400ae06b75d4a6e0d4978d59381d8
font_01_sfnt_off0000cf30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF30 10016 bytes
SHA-256: 3c59351088837c4d13fe07241fa2598a0a085a17b3bbfef4350199f3f62a7871

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