Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5aac453c7a2f43…

MALICIOUS

PDF

76.5 KB Created: 2021-01-26 23:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e38dc99a3da30ac6476c14ba242aee1e SHA-1: 7d4e08667e7fb7e3fb2e7a43aa1f130fe04eefdc SHA-256: dd5aac453c7a2f43a291e1e8c9d9874428bd3564f33dfbee88d1b7c1bd7b7eac
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely for phishing purposes. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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/123?utm_term=ddo+haunted+library PDF link annotation
    • http://bupojew.22web.org/lake_blackshear_fishing_report_august_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/jfqgjD9/xuguligixumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_5fe9ab3dae154.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/hhHNhaa/wuzufamave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_600b717cc25a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387433/normal_5fe64691835ae.pdfIn PDF document text
    • http://nawilojobate.iblogger.org/21220300887.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/bezorito/vizujojitawofotug.pdfIn PDF document text
    • http://taperimogitunal.epizy.com/fejixupad.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/bitumowejaxolere.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/gezepizusifejudowe.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/xedabololivaxufivagupu.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/gateway_school_great_missenden_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/90016281978.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/neonatal_conjunctivitis_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/vlookup_multiple_sheets_excel_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/google_play_store_app_pending.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/bamepijulisapiwim.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_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 4976 bytes
SHA-256: 16bd4202ac07550369508ebb9d0d645b30651d7d1638b1055210ad671fe04361
font_01_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 11028 bytes
SHA-256: cbe93eca16477d24c97e5ef5aafa31f100ce5fea8f6e3bc81e2d7590d9a1df4c

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