Malicious PDF — malware analysis report

Static analysis result for SHA-256 514a84a92f77e2a6…

MALICIOUS

PDF

76.1 KB Created: 2021-02-07 08:31:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f973bd1ced150623c4f9d8194200e179 SHA-1: aa14d2546e901a2a87279ff884416c75df2cc82c SHA-256: 514a84a92f77e2a606a88a0539863ed5fe7d99ce0d78e982a41bad6fe7e5c191
224 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file contains multiple embedded URLs, with at least one identified as a malicious redirector. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into running arbitrary code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/aws?utm_term=blair+witch+rustin+parr+pc In PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/zidarofaxadumab.pdfIn PDF document text
    • http://registrat.space/schema_electrique_va_et_vient_avec_voyant_lumineuxqwk6q.pdfIn PDF document text
    • http://good-production18.site/fundamentos_limnologia5aecd.pdfIn PDF document text
    • http://update-win20.online/95462374646zg647.pdfIn PDF document text
    • http://christinaanddavid2019.com/rakotetubezutojamudina7cjnz.pdfIn PDF document text
    • https://kosukanawator.weebly.com/uploads/1/3/5/3/135304621/ripuxekenuwu.pdfIn PDF document text
    • http://obzorov.site/diferena_entre_radiolucido_e_radioprnd41.pdfIn PDF document text
    • http://parhelifrl.space/868443604090p1th.pdfIn PDF document text
    • http://wow50.pro/sheet_pan_steak_stir_frym1hi4.pdfIn PDF document text
    • http://stroiline74.ru/my_new_hot_stepmotherx9bbv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504641/normal_5fdc48529e367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446645/normal_5fe8c79194814.pdfIn PDF document text
    • https://raxaregos.weebly.com/uploads/1/3/4/3/134363135/3439163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fe77730ce363.pdfIn PDF document text
    • http://clubstore.pro/gewosajifaditalen7fpoi.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/tomaxade/wazegov.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/80308863658.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/ancestors_the_humankind_odyssey_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/bosch_ebike_systems_diagnostic_software.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_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 5164 bytes
SHA-256: 81b363045cbc325f4d8c39b9b283db8e58990a518a59640bab1d619b422e12df
font_01_sfnt_off0000fdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFE 10932 bytes
SHA-256: c130f20a9ac87d4b663d62983a33e317140f81f07531042fe63ae9af9aca8b18

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