Malicious PDF — malware analysis report

Static analysis result for SHA-256 6741a9660f146415…

MALICIOUS

PDF

77.1 KB Created: 2021-03-20 20:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37eba982283c12fd715d85ab3b3f700b SHA-1: d1756ccd6c40aee801b5d9cc189d9036533b136b SHA-256: 6741a9660f146415ea3fc9a5f265714dd71edbe23eb2121e7e173a7a7b62a11b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that promises free organic chemistry notes, which is a common lure for phishing or malware distribution. ClamAV detected this file as Pdf.Phishing.Trojan, and a machine learning classifier also flagged it as malicious. While no scripts were explicitly extracted, the presence of external URIs and the phishing-like lure suggest the document is designed to redirect users to malicious content.

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://leonvi.ru/award?keyword=a+level+organic+chemistry+notes+pdf+free+download
    • http://sehq.xyz/how_to_remove_norcold_rv_refrigeratorbsbve.pdf
    • http://lovechat24.club/can_families_share_kindle_booksi8n1y.pdf
    • http://idealica-italiauficiale.website/tangled_2_hd_moviequ7q3.pdf
    • https://cdn.sqhk.co/zezaxemepe/i8gfcha/sazutatamakifigulete.pdf
    • http://cardioactiveuficiale.site/ce_guidelines_for_medical_devicesyfoqx.pdf
    • https://cdn.sqhk.co/zobelekivix/hdgchaq/gartner_hype_cycle_2018_erp.pdf
    • http://fumexijana.getenjoyment.net/carrier_58sta090_code_31.pdf
    • http://tevituvodejifep.mywebcommunity.org/aldehyde_ketone_carboxylic_acid.pdf
    • http://loxiturizule.sportsontheweb.net/sanitary_inspector_book_in_gujarati.pdf
    • https://cdn.sqhk.co/fekoguwiwu/eBIjhGK/small_hollow_ball_of_cells_in_early_development.pdf
    • http://zijixiteluwek.scienceontheweb.net/diabetes_type_2_diet_plan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xovajukoxin/euiv_poland_guide.pdf
    • http://dapizodipe.myartsonline.com/64797566969.pdf
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_42e69d6d04a5405f8e7ffac90deb02b5.pdf?index=true
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_ddee4bf0c0eb4b35b07c6982275e9dc6.pdf?index=true
    • https://s3.amazonaws.com/zikeko/73209944998.pdf
    • https://s3.amazonaws.com/dazinibonofobi/86866505776.pdf
    • http://dusameferadulo.onlinewebshop.net/tokedejopujonikub.pdf
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_1ec06b5ed693476d987c54596e79818a.pdf?index=true
    • https://s3.amazonaws.com/risisipajole/5170419616.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca0.bin
661d9266e6234b8ab241defe70b5236624888bb805f47691a2f44841160c9e02
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 5812 bytes
font_01_sfnt_off00010061.bin
2486c3a408fed7153df08d45c038fc9e65809f7951c3aa632235e62d98239e29
pdf-font-stream PDF embedded font (sfnt) at offset 0x10061 11236 bytes