Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4f7ee590e96d82…

MALICIOUS

PDF

74.9 KB Created: 2021-03-24 13:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 543930c76c392c89374ff17033753733 SHA-1: 2ef9b97449d3158c6cebe86fd887b946b06eaa76 SHA-256: ff4f7ee590e96d82716b4641d2475c022cc038cf8c97f911d41eb7515965f75f
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 highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://xezojetit.ru/strik?utm_term=how+to+crochet+square+blanket+left+handed+cast+on
    • http://dujalubudekir.22web.org/bookkeeping_system_template_excel.pdf
    • https://cdn.sqhk.co/nasanoroge/jex4Vhb/red_velvet_cake_homemade_easy.pdf
    • https://cdn.sqhk.co/pulununese/9NNggmo/19918616961.pdf
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wogokafen.epizy.com/45965599424.pdf
    • https://uploads.strikinglycdn.com/files/98ed5820-6b22-4648-a68b-667a7c0c3d4a/gexeninavi.pdf
    • https://uploads.strikinglycdn.com/files/2067110c-d130-4db9-a663-27d660a38738/naguf.pdf
    • https://uploads.strikinglycdn.com/files/0def3718-6838-4131-8c45-dd3d2af1f517/ubicacion_de_caral_en_el_mapa_del_peru.pdf
    • https://uploads.strikinglycdn.com/files/4ac0435c-3dd2-4962-8249-de7cf8ba9d24/phrasal_verbs_dictionary_free_download.pdf
    • https://s3.amazonaws.com/gateme/malexun.pdf
    • https://uploads.strikinglycdn.com/files/74341a6a-3271-4eee-891a-8445f8393c2e/rajejiresupokizofedumapu.pdf
    • https://s3.amazonaws.com/lixasifasi/butepolopoxokediniwinub.pdf
    • https://s3.amazonaws.com/kubafezin/68641170449.pdf
    • http://nupakavidowux.epizy.com/gagewabopib.pdf
    • https://s3.amazonaws.com/fibesezati/87445948275.pdf
    • https://s3.amazonaws.com/xasovewipeje/suwelej.pdf
    • http://puwirosefifoxa.rf.gd/neoliberalismo_significado.pdf
    • https://uploads.strikinglycdn.com/files/441f97d8-3270-4886-867d-99245e71e135/88650504336.pdf
    • https://s3.amazonaws.com/gozifep/rumufurutisosorog.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/xonexexipefilibawiroto.pdf
    • https://s3.amazonaws.com/gapivegek/79343621440.pdf
    • https://uploads.strikinglycdn.com/files/5a6510f8-91c9-41f5-a354-e5780815f706/1st_grade_math_activities_printables.pdf
    • http://pakimafagi.epizy.com/98981605666.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_off0000e87c.bin
4f65a711d4e0d3752a3eb577257be2cdab5dd672130104f28add53bbe082ff66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 5492 bytes
font_01_sfnt_off0000fb32.bin
378e284056376a603a9850b713d72b093124853364133ee92ca970238aa210c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 10092 bytes

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