Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c2a11d241943bf…

MALICIOUS

PDF

78.5 KB Created: 2021-05-14 01:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b66e8a70e6b93de2e24b1ec81029b14 SHA-1: a63e8e77652735b053c9b144688ba45f7d88f818 SHA-256: 19c2a11d241943bf9c98083d80723d5b064c90a518af00781d60bb6c23bbb1f9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=how+to+become+a+spanish+medical+interpreter+in+california
    • http://tilosag.mypressonline.com/jivajunitidos.pdf
    • http://osthondroz.com/nififagufinozumozi4b58g.pdf
    • http://joxitikoki.getenjoyment.net/92213029459.pdf
    • http://zalavsky.ru/54943505168k94i3.pdf
    • https://cdn-cms.f-static.net/uploads/4473616/normal_60557f8932a36.pdf
    • http://sitizinudex.getenjoyment.net/16903094115.pdf
    • http://urolog.xyz/jiledatabiwatisexofitui0vxm.pdf
    • https://static.s123-cdn-static.com/uploads/4409421/normal_600004b565621.pdf
    • http://copyright-central-media.com/95230120969efgik.pdf
    • http://krokoboko6.xyz/37456247m5iu.pdf
    • https://cdn-cms.f-static.net/uploads/4386822/normal_606c78d8906c7.pdf
    • https://static.s123-cdn-static.com/uploads/4459468/normal_5fe12d9cef46a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tobojelusiwi/how_to_integrate_1_cos2_x.pdf
    • http://junaken.onlinewebshop.net/anexo_v_simples_nacional_2020.pdf
    • https://s3.amazonaws.com/mokixetat/anker_a7908_not_turning_on.pdf
    • http://xawexixiwa.rf.gd/cbse_10th_maths_book_download.pdf
    • http://vodunoku.epizy.com/difutodixasurodigogewugiw.pdf
    • http://zijiwaras.onlinewebshop.net/artificial_intelligence_python_course.pdf
    • https://s3.amazonaws.com/tubupejevomo/61977043854.pdf
    • https://s3.amazonaws.com/besafefaf/maths_worksheets_for_grade_1_cbse.pdf
    • https://s3.amazonaws.com/neviwove/4692403238.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_off0000f504.bin
bb49878ff455a27ec2796696d842130875fd2d30948d3ef868cebc257f6d7e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF504 5588 bytes
font_01_sfnt_off000107df.bin
1d757e487fd3b596d7a18973295cc2d26ee9f397a85ce305a6ded55436b05364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107DF 10756 bytes

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