Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0c647cfb36532a…

MALICIOUS

PDF

107.0 KB Created: 2021-04-08 15:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: edaf3228947946f565c07b1eca4dd3c0 SHA-1: 14a17554aece27826e07ea827372e5e41a9b01f5 SHA-256: 9b0c647cfb36532a823eeb72085385f03adc24ca1a233d1940e9d275b6ef2c01
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=el+conde+de+montecristo+2002+pelicula+completa PDF link annotation
    • https://jegofedakosufe.weebly.com/uploads/1/3/5/3/135320490/3933774.pdfIn PDF document text
    • http://rankingcoach-seo.com/gasoline_electronic_fuel_injection_systemmk5hp.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/lista_de_conectores_en_ingles_y_su_significado_en_espaol.pdfIn PDF document text
    • https://pexevirojaloko.weebly.com/uploads/1/3/4/8/134882405/2353964.pdfIn PDF document text
    • http://timecodes.net/spanish_numbers_worksheet_answersh7udu.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/chantel_jeffries_taz_angel88lu2.pdfIn PDF document text
    • http://digtalcaliper09.xyz/pexonidv2jr7.pdfIn PDF document text
    • http://testertumentum.space/49901508903gncti.pdfIn PDF document text
    • http://50offstore.info/xegesikagabavabaua8ep.pdfIn PDF document text
    • https://voranafirodibug.weebly.com/uploads/1/3/2/6/132696030/55801dbcb7.pdfIn PDF document text
    • http://leree6.club/8355560039gm68l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/aesop_s_fables_worksheets.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/16628138493.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/xebasiwonubogigakupidag.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/vepufon.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/acritas_stars_database_and_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/chithari_therikkunna_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/sazupitisedi.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/perewudeditezune.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CE 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off000142b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B5 5452 bytes
SHA-256: 27a0e93ff087247598f5a6b3ccd855a8bd704eb468bfd713169292723aa5c342
font_02_sfnt_off0001551d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1551D 2316 bytes
SHA-256: 5b91c186c0d2506cbb1932d417fe2e40edf424c68f696d43443a27f8f7fee313
font_03_sfnt_off00015f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F0B 12688 bytes
SHA-256: ee7b8596344763217c07eeb5b2a442afd5294b9bd4a277ed7db51f41f568b758
font_04_sfnt_off000186f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186F2 16028 bytes
SHA-256: 8345d1cc2b6b461b856d0454e2cf67edf5851291b6d0ebf21a7da0c9813a2b7f

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