Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8483ed533611587…

MALICIOUS

PDF

87.2 KB Created: 2021-02-26 23:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 87775242a9b7ffedb5045c2b0bc484f8 SHA-1: 87cc50785fc943dba325cc14257fdc74d0e787a3 SHA-256: f8483ed533611587a2b2415224a0e5a7a711509be493e00ad95977494e705278
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful content.

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://vilenefex.ru/wix?keyword=shadow+monk+cleric+5e PDF link annotation
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/1eddd2d0.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/sisowonu.pdfIn PDF document text
    • http://dostafood.xyz/can_you_be_a_programmer_from_home1xh1r.pdfIn PDF document text
    • http://jopkapopka.online/67194158270igedu.pdfIn PDF document text
    • http://tehnotop.site/bubewojlohz.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/call_me_by_your_name_peach_scene_excerpt.pdfIn PDF document text
    • http://pokupka.space/jibexowogefewenabelef98qv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waxukoke.epizy.com/asus_p5n32-e_sli_specs.pdfIn PDF document text
    • http://varaxekewuveza.epizy.com/96601440994.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/doxoka.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/sejurazowov.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/9446727470.pdfIn PDF document text
    • http://tosaxope.rf.gd/digital_circuits_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/90608038328.pdfIn PDF document text
    • http://likifodafiduno.epizy.com/19398430444.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/jeep_wrangler_interior_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/lonedolarobakunira.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/piwematatuguwamepofetofab.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_off00011989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11989 5384 bytes
SHA-256: 1daa46f125745e4845660b3c4690db8b04a141680ac10afdb60a807b22120d25
font_01_sfnt_off00012bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBE 10448 bytes
SHA-256: 47fec499c7587b0a84dc50e5d5f15ae8a6423faede012ec4357a3e895a2b283d

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