Malicious PDF — malware analysis report

Static analysis result for SHA-256 2590300ab2a916f3…

MALICIOUS

PDF

75.0 KB Created: 2021-02-21 06:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e9a08dd9b6abba1266c62db30cc2844c SHA-1: 051ff83da78b699f1f048d343b52d89811379b66 SHA-256: 2590300ab2a916f383f876a2313643223a8de014fe9e91b74d90c68054df25e6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as part of a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or trojan distribution. The embedded URLs suggest an attempt to redirect users to potentially malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=solving+and+graphing+inequalities+worksheet+answer+key PDF link annotation
    • https://xikemusuvef.weebly.com/uploads/1/3/4/3/134322181/sedamonivex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417220/normal_5fef5e33054ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475738/normal_5fd1bdce02c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_601cfcf5b9e01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vanatul/25820180942.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/vimipatijudojunekaxomi.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/60511309099.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/40581698248.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/mezalawesejaruxevufinobi.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/tamil_life_advice_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/6419111636.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/9th_grade_algebra_problems_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/pigavafekobego.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/bokiresojip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD940 5652 bytes
SHA-256: 5fdc65768a961d810c67bf2ef76c6fe3788f24a0438f39ccb737dc7635d45852
font_01_sfnt_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 10780 bytes
SHA-256: d4ec036f1c1fc1b492e870c11b161f90a3673bd0a5af4cd09fa09384e021486b
font_02_sfnt_off000110fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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