Malicious PDF — malware analysis report

Static analysis result for SHA-256 569dd2430ecbb537…

MALICIOUS

PDF

70.4 KB Created: 2021-02-17 12:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: be224393b1698cd64f74149b73649033 SHA-1: 5a104847a73d9bf3620aa73cc59c7ee95e79dc64 SHA-256: 569dd2430ecbb5371e37b135a187555c329f056f516cf561e188db828438d2fc
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL, 'https://leonvi.ru/wix?keyword=instalaciones+electricas+residenciales+libro+pdf', suggests a lure related to technical documentation to entice users to download the malicious PDF. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attempt, likely leveraging social engineering to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=instalaciones+electricas+residenciales+libro+pdf PDF link annotation
    • http://lami-lashes.site/corte_de_cabelo_em_capas_e_degrafilakgcw3.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/103463452665axag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486199/normal_6014f33102eb9.pdfIn PDF document text
    • http://copyright-infringement.business/los_72_nombres_de_dios_en_hebreo_y_su_significadogvpwk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417122/normal_6008ce4cc7d15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476751/normal_6013a8b2e6860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425929/normal_600df367c7237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423757/normal_60291a45a237e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489058/normal_5fda740981e38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_5ffa51af286b4.pdfIn PDF document text
    • http://xtw2.club/el_socio_jenaro_prieto_libro_comig0nn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/zusavebezilivaji.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/70143014529.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/hymns_sheet_music_for_violin.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/plant_systematics_phylogenetic.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/20765878306.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/turelinofewaroxaloz.pdfIn PDF document text
    • http://medesawawolujim.epizy.com/12027667088.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/php_html_formatter_vs_code.pdfIn PDF document text
    • http://tiriburud.rf.gd/neripakudalomufemadeta.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/fun_poetry_writing_activities_for_middle_school.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_off0000d30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30E 5224 bytes
SHA-256: acc62ca98ab794efa4e2846271d64d2e4d1f8876c8112310abec1b27aff30521
font_01_sfnt_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 11336 bytes
SHA-256: d1c8b52d8fbcc82c6f618b0398a20fde1412bdd0038fdc8ec1abaada595fb2c5

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