Malicious PDF — malware analysis report

Static analysis result for SHA-256 c004a57db4fb9a9c…

MALICIOUS

PDF

66.8 KB Created: 2021-03-30 18:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24f9b9f386d6851f85e78480cd04b198 SHA-1: ccea1c7bf4734b77978a7d02606f7670a58168bb SHA-256: c004a57db4fb9a9cb4b5a6dbc017b7f1e6523fcc89f75bee4d11e3eb0d92513b
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8523

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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=plenilunio+antonio+mu%25C3%25B1oz+molina+pdf+gratis
    • https://latuxuxapeja.weebly.com/uploads/1/3/0/7/130739017/nujaxisixisa.pdf
    • https://cdn.sqhk.co/vizoxaxijojo/ehaLjhM/97623258692.pdf
    • https://cdn.sqhk.co/vujenibolo/aVIjjaA/3489057354.pdf
    • https://cdn.sqhk.co/zawafolor/JJtjhif/voduwugiwoz.pdf
    • https://taretowixulu.weebly.com/uploads/1/3/1/0/131070971/vezuzovokipa_wakokaminekabe.pdf
    • https://cdn.sqhk.co/retesixabe/5ghScJn/renfrewshire_council_business_world_log_in.pdf
    • http://tuvivukaroj.mygamesonline.org/11181315900.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedatowuka.epizy.com/14697197358.pdf
    • http://demuremapinob.epizy.com/nobobixubikidudobajogewo.pdf
    • http://norenebe.rf.gd/theeratha_vilayattu_pillai_bgm_in_masstamilan.pdf
    • http://sedilipabowarad.rf.gd/85952088277.pdf
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_4415afd5802d48eb842f67cd0b0289f2.pdf?index=true
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_a09cae93601046a2b6171e6e2c52461d.pdf?index=true
    • http://minivenema.atwebpages.com/boucher_textbook_of_prosthodontics.pdf
    • http://risepaxazitomep.rf.gd/a_theory_of_human_motivation_original_publisher.pdf
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_e74319c1d97d4794be70298d1ccfa36d.pdf?index=true
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_3f5ba16fbf5b4b2db9905ed439854c57.pdf?index=true
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_73f0ed225da248bda9df1b98d741677d.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed08.bin
ec8317b340ad3bc4aa8fe1eb660a5b190a770ff0b85c6d263e218101d5c91239		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 5624 bytes

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