Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce89e54174c98622…

MALICIOUS

PDF

71.0 KB Created: 2021-02-19 13:58:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2cce1c805c6e6e99c385734a6da0dcc SHA-1: 256e7abef9f0a1f735306cccc407507266f97169 SHA-256: ce89e54174c98622267965eabfad1ca7eaa0e68a22ad0a426bf50ba3c1b30022
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized content, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://leonvi.ru/wix?keyword=read+skim+graphic+novel+online
    • https://cdn-cms.f-static.net/uploads/4368495/normal_601a46f05dd35.pdf
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/7c5b55b.pdf
    • http://finansi-7.online/34879420289roquw.pdf
    • http://wulodab.iblogger.org/customizable_bubble_sheet_generator.pdf
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/kigolesetewa-jodoregurilu-tupefok.pdf
    • http://damita.fun/pocket_rocket_bike_for_adultsroh9b.pdf
    • http://sibuvre.com/download_psiphon_a_pro_black_apk_androidcfi4e.pdf
    • http://nout-prokat.website/82727595254b9z9e.pdf
    • https://walupufodurutos.weebly.com/uploads/1/3/4/7/134734499/3ab450f05d94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vabedafozo/togilegiru.pdf
    • https://s3.amazonaws.com/lulelepese/misalodog.pdf
    • https://s3.amazonaws.com/xelimewat/linkedin_company_banner_template.pdf
    • http://sekijipaladi.epizy.com/vande_mataram_original_song.pdf
    • http://xibiwoziveva.epizy.com/vagomedudoxig.pdf
    • https://s3.amazonaws.com/wemupajese/64486340060.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d98c.bin
3a4563c92b44a3cda41a049963d89691755b63656e6f95ba0fec5169a675abe2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD98C 5620 bytes
font_01_sfnt_off0000ec90.bin
69c58932d8227f64351f290899fe514b2a1e555de2404a8ae2288ca8d504b1dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 10208 bytes