Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea9489f9fe132a7…

MALICIOUS

PDF

118.1 KB Created: 2021-04-14 15:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1620145866d52a3761c0d9ea2f7e65b6 SHA-1: 7353a4c485fc1a5da810ef2b72700b0a6797f933 SHA-256: aea9489f9fe132a7fc58f1259e2a81ee2a84c7382074f6e1aa1a412793b2f421
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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
  • 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://pelibifir.ru/strik?utm_term=windows+bat+for+loop+example PDF link annotation
    • http://bcpzon4segurabetaviabcp.com/onan_microquiet_4000yjsze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5fce9ce78f198.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/life_after_life_raymond_moody_read_online.pdfIn PDF document text
    • http://jijoxep.getenjoyment.net/esl_appearance_worksheet.pdfIn PDF document text
    • http://spiritstudio.ru/imagenes_de_medios_de_transporte_terrestre_antiguosqkxq7.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/danagozuhfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_605ce9c27a7ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482190/normal_5fe92f7028fec.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/introduction_to_biopsychology_10th_editionkj2f3.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/makumapikeze/josadolifatejen.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/busuporijokafisopabitebob.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/revenebavuzevunuvojunov.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/excel_advanced_skills_writing_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/nositapu.pdfIn PDF document text
    • http://sadoboxijowem.myartsonline.com/causes_of_obstructive_jaundice.pdfIn PDF document text
    • http://gototura.myartsonline.com/john_deere_44_snowblower_gearbox_oil.pdfIn PDF document text
    • http://pekomuvave.myartsonline.com/stroke_in_sickle_cell_disease.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_off00018aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA8 5500 bytes
SHA-256: bd717af623a147bef8b1f7306acb6c3b86a3dd69683a9cbccbe2da85b5af4875
font_01_sfnt_off00019d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D60 12908 bytes
SHA-256: 5c2b7fc3daf1f05fb8c1d8554aca06144cb8ca53d3e9a5b5d93bbb500238d495

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