Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22784d397d65c89…

MALICIOUS

PDF

76.8 KB Created: 2021-03-02 19:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8646993f53d459be50791aad9daf26a5 SHA-1: cc9c4345b96bcaa56a75d4c54f7289cd316bc2e4 SHA-256: e22784d397d65c895dd5e6d314d9a6712a14e783970677c6d5bfa13d29c6f94c
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by a ClamAV signature and an ML classifier. It contains an embedded URI pointing to 'zajinet.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to an 'organization of the nervous system worksheet'. No scripts were extracted, but the presence of external URLs indicates an attempt to redirect the user to a malicious resource.

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://zajinet.ru/wix?keyword=organization+of+the+nervous+system+worksheet PDF link annotation
    • http://digitalmedialit.com/xojebaguregewitudumelout8t9.pdfIn PDF document text
    • http://organic-ita.space/buporisapilifatrkvm.pdfIn PDF document text
    • http://igcopyrightverify.com/pl_sql_certification_dumps_free_download4ei8t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427284/normal_5ff80941c856b.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/zixaj.pdfIn PDF document text
    • http://erkutungotu.com/36706494460h86cq.pdfIn PDF document text
    • http://ecoterritory.store/23659587460la2jk.pdfIn PDF document text
    • http://curvepreloved.com/42100400923244i8.pdfIn PDF document text
    • http://rte-ita.fun/kadajikor2s0wf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_601f9c3d09778.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/juvuraguvutoxif/armorseal_1000_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/59544044916.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/bumotoz.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/78139647528.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/free_illustrator_font_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/linear_equation_with_two_variables_worksheet.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_off0000efb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB8 5544 bytes
SHA-256: 9ca5192d0c19547328cd9fadee45a8dec201ce7e5e1d126cbdca041e34c26498
font_01_sfnt_off00010292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10292 10360 bytes
SHA-256: f230ef6b8da2660c860eacae30dd92ece40cd788c23f04a843bdd987e54bad8c

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