Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4dc2086f3c3a407…

MALICIOUS

PDF

79.9 KB Created: 2021-03-17 23:27:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c6535c91f27658b57464765f7d60f207 SHA-1: dc4d38d8c612f5fcabfdfb7023b610ab02acfbd7 SHA-256: c4dc2086f3c3a407347b10c81bb586069cce2b036be3074d54e8b4e35ec046c8
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to business value chains, suggesting a spearphishing attachment attack vector.

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://xezojetit.ru/award?keyword=que+es+la+cadena+de+valor+de+una+empresa+pdf PDF link annotation
    • http://baranaydin.org/31807344776y6vgg.pdfIn PDF document text
    • http://winsl.space/95414409044p6xst.pdfIn PDF document text
    • http://majozugu.iblogger.org/50304757361.pdfIn PDF document text
    • http://verifybadgesbusiness.com/11320357816w70br.pdfIn PDF document text
    • http://easylearning.space/2497709455939od7.pdfIn PDF document text
    • http://ighelpcenter.xyz/rca_rtd317w_manualvl4yw.pdfIn PDF document text
    • http://xiwotafajiloluf.22web.org/high_dose_flu_vaccine_information_sheet_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c32ec761-8cfa-44ad-8980-37c46e7986f6/raxapizexodite.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/rokirazevezab.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/turbochef_bullet_f3.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/36999892122.pdfIn PDF document text
    • http://sapofikij.epizy.com/forensic_audit_report_of_satyam.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/27713174607.pdfIn PDF document text
    • http://kasanuvuwa.epizy.com/reflected_in_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/naximataxukapuwunorisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845efca0-4d42-44d4-95d9-c83b1405cf90/96119150208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef70113-f663-41b0-9fbb-eae1b52157a0/meade_autostar_suite_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/juvukuzaxebaluzajemax.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/guwanololu.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/red_jumpsuit_apparatus_song_lyrics.pdfIn PDF document text
    • http://resopuz.epizy.com/libert_paul_eluard_texte__imprimer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 5176 bytes
SHA-256: 87157709101bc44542e25ff08b116bbd4aa3019a03900b025e12e7bc579e45e2
font_01_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 11376 bytes
SHA-256: a0fc56be28a079a4ab689d984588c10bf67f9fca628838e454eeaadc2c236e31
font_02_sfnt_off000121fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FA 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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