Malicious PDF — malware analysis report

Static analysis result for SHA-256 e874d91ada4c5671…

MALICIOUS

PDF

101.6 KB Created: 2021-02-13 10:38:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3530c87edee1f937c1f9db159ab591d6 SHA-1: 8a9e6b81ad02ae35657299e6346b25ebd5d08041 SHA-256: e874d91ada4c5671ea0725bc75da312af271abcabd334654370b6c07acc18f38
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The embedded URL and the heuristic firings suggest an attempt to direct users to potentially harmful content, likely for phishing or malware distribution.

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://druttle.ru/wix?keyword=prism+weight+loss+program+phase+1 PDF link annotation
    • https://widajuzuno.weebly.com/uploads/1/3/1/6/131637349/zabijixotuv_wilero_roderu_vejozeb.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/mewovi.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/hbgehiQ/widomodo.pdfIn PDF document text
    • http://lupaper.22web.org/gojetotin.pdfIn PDF document text
    • https://jigudubexafodi.weebly.com/uploads/1/3/0/7/130738940/vefifef_tumefakejupow_bisopales.pdfIn PDF document text
    • https://tabureribe.weebly.com/uploads/1/3/0/8/130813037/gemizurujo_latasowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wunekoxewufomaf.epizy.com/jikebojavojowonifenu.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/xixovarupugobifom.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/jizufikitewin.pdfIn PDF document text
    • http://botetuvixomidiz.epizy.com/dijaliwon.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/capacitor_value_calculator_apk.pdfIn PDF document text
    • http://xuxobijeno.epizy.com/3469514165.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/31854728749.pdfIn PDF document text
    • http://jiwerefupuz.epizy.com/48449732691.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/calendar_math_worksheets_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/android_app_development_security_best_practices.pdfIn PDF document text
    • http://nupituf.epizy.com/gujonowasamugoxusi.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/chingy_free_album.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_off000153a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A2 5380 bytes
SHA-256: 53c79524e9f74ab7e17ab5a8379b4dfe931f558a2a314e94b2a8b78fcfe61418
font_01_sfnt_off000165d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165D6 10360 bytes
SHA-256: 8bd70188a9b2a1309289c882cf1b5c2e6fb0912083acc70fb9863ed6c5e19be3

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