Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d5421b45092beb…

MALICIOUS

PDF

64.0 KB Created: 2021-05-11 09:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aef6fc5e51cf2100e64cd0c2bfb68e26 SHA-1: 574933744ca24baf9b36f38672b5c49de1f3e14d SHA-256: d5d5421b45092beb1223566359974e130a83245e6b184ceba84647a0c5afecc2
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it's used to redirect users to phishing or malware download sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting designed to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8154

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=systemverilog+virtual+interface+class
    • http://nopuvobetag.mygamesonline.org/collections_class_in_java.pdf
    • http://profapp.pro/chemistry_class_12_notes4yjic.pdf
    • http://siwosupegejolop.medianewsonline.com/48807857234.pdf
    • https://cdn.sqhk.co/vewukiziwemi/ghhhfL9/wodoju.pdf
    • https://cdn.sqhk.co/gunonutib/bviciWV/angelus_paint_brush_cleaning.pdf
    • http://terem.space/frick_ammonia_compressor_training13015.pdf
    • https://banezinalirunod.weebly.com/uploads/1/3/1/4/131437453/julazitiwibinosuje.pdf
    • https://somalinoduka.weebly.com/uploads/1/3/5/3/135392385/fiwonuvuxiwi-zorakajowogupi-gazetarefogebuk-fakipekitokudi.pdf
    • http://robolab.one/sea_of_thieves_pc_errorg8oti.pdf
    • http://hrushch.space/lg_inverter_direct_drive_dishwasher_water_not_drainingt85t8.pdf
    • http://megesodore.iblogger.org/zanussi_integrated_dishwasher_installation_guide.pdf
    • https://pujonavow.weebly.com/uploads/1/3/5/9/135958036/4dab2902ed4c.pdf
    • http://mirijesuwakug.sportsontheweb.net/savut.pdf
    • http://itasda.online/64587384323q6nan.pdf
    • http://sasegotib.medianewsonline.com/12587446021.pdf
    • https://cdn.sqhk.co/mevazasid/ghicMZH/rofefanuzezulugot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_72b8f7114da7463baadc757361c1e1be.pdf?index=true
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_e1366ce9f5e548e79fc7b61b66ab7ab6.pdf?index=true
    • https://09af0a6c-c0e6-47ff-90c1-5b173435ccd1.filesusr.com/ugd/b92b66_0bb3d6c7675341d98cfe6ec9d33c9b62.pdf?index=true
    • https://9b56c271-8e60-4ff0-96d1-8930f8c082f8.filesusr.com/ugd/5a1ab0_9eccd3fbbbc34a868523ebbcc7376e1d.pdf?index=true
    • http://vexabimumemig.atwebpages.com/awakening_the_third_eye_free_download.pdf
    • http://buzabokinoka.epizy.com/xofub.pdf
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_9d2e27d93f644832a6c16c90069213f7.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db17.bin
2c1e27f9292b4745aca961ed5cfb05e3a184ef49e50fcb8aa061a8576dc5595d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB17 5468 bytes
font_01_sfnt_off0000eda2.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 1800 bytes

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