Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ab638f6cdae404…

MALICIOUS

PDF

76.8 KB Created: 2021-02-23 00:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e6abcce1cc120eb2aa1cbf613b09288c SHA-1: 53f1c03289303d714d0538daaef90c02a6302414 SHA-256: 55ab638f6cdae4046ed9fe86e60ecee91675663a737ecb12d912e7749b3fec8f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a topic related to European division, possibly as a lure. No scripts were extracted, but the presence of external URLs and the overall detection profile strongly suggest this PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://seumenha.ru/wb?keyword=how%20was%20europe%20divided%20and%20what%20were%20the%20consequences%20of%20its%20division PDF link annotation
    • https://cdn.sqhk.co/xanuramalu/icbPieQ/nick_jonas_diabetes_commercial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6010c92b6fd80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_601850f9759d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_601b6a39a43a1.pdfIn PDF document text
    • http://pevetune.66ghz.com/weather_report_kahului_hawaii.pdfIn PDF document text
    • http://jalatuxu.iblogger.org/94873083756.pdfIn PDF document text
    • http://mimasajikataza.iblogger.org/46505473142.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/JKigMBM/diledumuba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446773/normal_6030d8c4b8b86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_602ed2a187128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416939/normal_5fffc055994c6.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/luworizesupox/varopenujum.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/kajozokogedi.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/tewemewilapa.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/filojomawovojivonure.pdfIn 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_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 5448 bytes
SHA-256: f1ee6736e6f192d3a5c00d600ccdbe79f746bcc56df190a81cd2036f5bd54384
font_01_sfnt_off00010090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10090 11432 bytes
SHA-256: 83442f356186e1aa28b1da8a985c0b44fe45a7d474b95867de1c5f7d88cdcd2c

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