Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f50add0dca45dcf…

MALICIOUS

PDF

75.2 KB Created: 2021-02-21 10:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1971b4b506660fec1168b9fcef733834 SHA-1: 4ef867870a9a4358a9e82496d3acfc92a4fac766 SHA-256: 9f50add0dca45dcf8493d7a285879f145543ca2dacd5a142a51e14a3966f4069
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The presence of an external URI and the overall detection suggest a phishing or malware distribution attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=teaching+basic+writing+skills+hochman PDF link annotation
    • https://cdn.sqhk.co/dagosasojo/ihjXDN0/15749737099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_60303a8adbf70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5fd66cc63a30a.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/1ifibjd/lokesa.pdfIn PDF document text
    • http://xuziduliwilu.iblogger.org/chevy_volt_2014_owners_manual.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://s3.amazonaws.com/zukogi/cariloha_resort_bamboo_sheets_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/acca_f3_notes_free.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/towixiwunuwabavulib.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/house_rent_receipt_template_india_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/always_awake_android.pdfIn PDF document text
    • http://gomiguru.epizy.com/adobe_after_effects_cc_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/dimiveze.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/corporate_finance_for_dummies_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/field_specification_sheet_example.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/acute_lower_limb_ischemia_guidelines.pdfIn PDF document text
    • http://wufutogaj.epizy.com/happy_birthday_wishes_for_sister_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/saas_license_agreement_template.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_off0000dc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC86 5244 bytes
SHA-256: 9bd3d08114e8a725815b6969d3017da80f2b339ec2c7a6dd1e75d0bde7d01251
font_01_sfnt_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 10184 bytes
SHA-256: 9d9afadf6b218d44fdfd3c1f151a65f7be3147c988fe0024cdbfdbd228e209bb
font_02_sfnt_off000110ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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