Malicious PDF — malware analysis report

Static analysis result for SHA-256 b565440bd202a113…

MALICIOUS

PDF

89.5 KB Created: 2021-03-17 18:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50fcad41b3ad7889524215caec4c72ff SHA-1: 4b234dd58e84d424f1fde55ed46fb297421eceaf SHA-256: b565440bd202a113fce1ea6b1d82aac9c56a8bd486af6846a62386d85d6de2e4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'botokaw.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or spam campaign designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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
  • 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://botokaw.ru/strik?utm_term=best+spoken+english+classes+online+free
    • http://narixuz.mypressonline.com/buyers_guide_form.pdf
    • http://pidawudimo.scienceontheweb.net/kizixesap.pdf
    • http://laluwaraselolar.mywebcommunity.org/ap_polytechnic_syllabus_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_daa6a5abd8bf4ba5be82148f5606f2f9.pdf?index=true
    • https://2a6c20f5-091f-48b5-a5be-bf749919b1f6.filesusr.com/ugd/3794ad_64f67dea24684b9e99a19cd2d1ad9575.pdf?index=true
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_2d1e61c551ac48308aea0185b3e51db9.pdf?index=true
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_8a12d66d4202444e98fad7871678279d.pdf?index=true
    • https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_a81fed5c40c146809f9ad1ae7e1f08a7.pdf?index=true
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_e6425249f3e845ae98f6dd0c565535ae.pdf?index=true
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_e176db0e00af45d997f3db178620e50b.pdf?index=true
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_5dd44acbb4624b56b85a299988a9fb54.pdf?index=true
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_9f50053d262c4c05a73b2e1d1350c28b.pdf?index=true
    • http://xakagigoneliv.myartsonline.com/lolivanisagedi.pdf
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_c0f15b37f5af46ce83da25397abad8ec.pdf?index=true
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_f2586e775f9942ed97650a9e55f72029.pdf?index=true
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_a18a67cc810d4af9aeb07001cab787ac.pdf?index=true
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_460b95091ea64b6da5003b657351c993.pdf?index=true
    • https://19a39513-20cc-49d1-a75c-e30ce0314142.filesusr.com/ugd/f99735_25561f45952247f6ac43071b290173fc.pdf?index=true
    • http://mawidinivetobi.myartsonline.com/bogimexamoxanu.pdf
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_8d1e2bb7e20f4afea2d61246bbca5e81.pdf?index=true
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_fcca846abeee429ba4c20da5eeb2765f.pdf?index=true
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_ac92ebf1f96b4210b91306ac6ea5838d.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a65.bin
d39bf31895e662b77fdf707c28c0a7429fc7222d94e38ccc0290a724cd79dfc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A65 5392 bytes
font_01_sfnt_off00011cc2.bin
19c77b5a368e9ae21b6c7234a361c6bd0014f3ffec210b45963bd48ad60fc9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC2 11144 bytes
font_02_sfnt_off000142fd.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142FD 16204 bytes

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