Malicious PDF — malware analysis report

Static analysis result for SHA-256 5602dd4d4a52a0b9…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 17:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2f179e3339471758b9974815342e9cd6 SHA-1: c3c2a987a90ff31b40ad2e1635ed5c5294d57867 SHA-256: 5602dd4d4a52a0b93d841b3e0479ed153ea64fdec457ff796e9da0abdb24e858
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=autocad+3d+assembly+drawing+pdf PDF link annotation
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/dizupuj.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ibwBic9/64954992411.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/dhdgfHO/wunuwuz.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/Subo3id/11144671021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_60175d999492a.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/jii1gid/komupoz.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/dobikasukavu/accrued_cost_in_balance_sheet.pdfIn PDF document text
    • http://fopagozijudiri.epizy.com/7th_grade_math_brain_teasers_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/84084419126.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/mythbusters_diet_coke_and_mentos_worksheet.pdfIn PDF document text
    • http://nafivinada.rf.gd/jazz_build_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/43697984051.pdfIn PDF document text
    • http://bojivudotafaf.epizy.com/thank_you_for_answered_prayers_quotes.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_off0000d7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 5964 bytes
SHA-256: fd3e134da34c71169c94aea4f29680d3fefcfec65a91c99f9ee07427a1332744
font_01_sfnt_off0000ec39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC39 11528 bytes
SHA-256: dcbcafa83aaf369daa94ded7f4b2067a081978648493121165792337ff6234b6

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