Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc298c74a2baaf2a…

MALICIOUS

PDF

87.4 KB Created: 2021-03-23 12:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8291834fab2cf15f424227f3be560da5 SHA-1: 7c3c756bc954350f2960339c30c5e01f3c954936 SHA-256: dc298c74a2baaf2af079cb8bd3a8ad3bd7c2e81527176cb0d6b15b41225efe77
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it functions as a link farm. The primary URL observed is https://xezojetit.ru/wix?keyword=marli+van+breda+instagram, which is likely used to direct users to malicious content or for SEO manipulation. The presence of numerous links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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
  • 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://xezojetit.ru/wix?keyword=marli+van+breda+instagram PDF link annotation
    • https://wigubidukes.weebly.com/uploads/1/3/1/6/131606651/dugiso-mefavijazujum-biwovimemo.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/ff1692dc6f8cf4.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/8566493.pdfIn PDF document text
    • https://misurenagikokiz.weebly.com/uploads/1/3/5/3/135332419/1d3009.pdfIn PDF document text
    • https://levevozupub.weebly.com/uploads/1/3/1/4/131407214/5280658.pdfIn PDF document text
    • https://malosana.weebly.com/uploads/1/3/5/3/135323031/lekupopos.pdfIn PDF document text
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/xokapofi_digizepijugedow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://f538c46d-6aff-4997-95da-320e40b30403.filesusr.com/ugd/262ba4_2b66b0619ac647859145c27f761e8132.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f54383-4bf6-4dfa-8440-109eb2119c36/4569411877.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_ad822d7f8c2f4fcd8a9f48b39b16cb54.pdf?index=trueIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_85a61101663f48238eaa53e9e7fdbbdc.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_16e1a9cea13848e2988e708a59d66033.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_ddcbb185ecb746adbcf8064470d67129.pdf?index=trueIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_ef9adbb8a09f4f6482c7fa4ced2daf25.pdf?index=trueIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_1ae9b6d0b3ab4ac6b2bfceb6c9776a40.pdf?index=trueIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_ddd255636e9744a4a61c7dc218c438a5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6348be-51cf-47ff-9a0f-106bf70492b2/negadopawawefogabed.pdfIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_07d8a7b972624f299f384fa59faa9756.pdf?index=trueIn PDF document text
    • https://a19d597f-2220-41b3-9459-688249e8a20b.filesusr.com/ugd/f19f53_3657e0a62fd14f3d83f804a6a1f9ed63.pdf?index=trueIn PDF document text
    • https://4d3f6715-1114-433d-a4b7-45a5e22e3858.filesusr.com/ugd/ce86b4_54b424d3543e48ad86e9592d482b4c52.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_1de9c1c6531648069c5228c4f535c614.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 5028 bytes
SHA-256: 734aff2dbc6885706a87498c0563889d1e5493abe8f244cf860dad84762644cc
font_01_sfnt_off00011528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11528 14324 bytes
SHA-256: 2312ebec451355d1f7f8c5c8edb760cca99053e6f5e66a73462631f6358d9af3
font_02_sfnt_off00014276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14276 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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