Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e75a77579ef295…

MALICIOUS

PDF

98.5 KB Created: 2021-03-09 19:21:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0094b8d2fde3e76f7745709f96cd68ca SHA-1: 4415d90f825ab09bdcce54a4a6e1daab4351288d SHA-256: e4e75a77579ef29538603bec90713ef8b633caefa2dc839065f292d07b7ac5a6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with the primary malicious URL being https://resalured.ru/award?keyword=halong+bay+map+pdf. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The presence of embedded URLs and the link farm suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://resalured.ru/award?keyword=halong+bay+map+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384150/normal_601f2a3586c34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463277/normal_5ff933ee38520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_6047517774af0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5ff97beb5e0a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokelur/blastomycosis_treatment_guidelines.pdfIn PDF document text
    • http://zusozeduraxo.epizy.com/75275368288.pdfIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_e607a952b3594271b06fe80328947721.pdf?index=trueIn PDF document text
    • http://xuxivobanirug.epizy.com/acpi_atk0110_windows_7_driver.pdfIn PDF document text
    • http://wonoxokibe.rf.gd/bitis.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/financial_reporting_software_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/xoritijusujuruwos.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_372a6311cfa84986a43867f6962b74a1.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_99869d3fe89544af9a41e2e9f6c42ba5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/peripheral_vascular_disease_physiotherapy_management.pdfIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_f9146f118dda43d9809aef2c975994a9.pdf?index=trueIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_be36936c068c4c2dbefd4339ed0b97cb.pdf?index=trueIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_0f9d0ad058ea4023ad2a1503bc62c1e4.pdf?index=trueIn PDF document text
    • http://nepunefetonub.epizy.com/76334453039.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/22495416795.pdfIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_21f1df4eb6cb4b0c93ea2de313962939.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB8 5288 bytes
SHA-256: 6be73c4594a8153c722ded1a5490edc350dc3f44c08aaa4e7b9d0e0fbb865d3c
font_01_sfnt_off000150ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AC 16500 bytes
SHA-256: db80bf70c3696aafa4639b491b7083365b63dfcba4008bcbc174acc856053a15

Open this report in the interactive analyzer, or submit your own file for analysis.