Malicious PDF — malware analysis report

Static analysis result for SHA-256 27eb62c25cd67c2a…

MALICIOUS

PDF

78.7 KB Created: 2021-02-27 10:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 031bc0be959004e0844d689aa590c801 SHA-1: d9bd61d029941c9edaba2b2a146b87989b4ddf6a SHA-256: 27eb62c25cd67c2a434d8ec2e1e3425ecd763f48a14be2caf9ab67b16c9850a4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content. The primary IOC is the URL 'https://golowaki.ru/wix?keyword=jammer+app+for+fish+table', which is likely used to host a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=jammer+app+for+fish+table PDF link annotation
    • http://gikadoketu.iblogger.org/zebra_zp_505_user_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384149/normal_5ffd2976bb3d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381085/normal_5fe49bbb81869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464702/normal_60294c6764948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_6017a30219718.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/belabaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_5fe6fcf423302.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/gofiguj/ablls_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/dinafujida.pdfIn PDF document text
    • http://janutepapuzise.rf.gd/xugew.pdfIn PDF document text
    • http://gemakeruw.epizy.com/59197787123.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/kim_tra_c_o_form_kv.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/krishnath_college_anti_ragging_form.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_off0000ee24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 5268 bytes
SHA-256: 321a3933849fa259b19dcd946259c71497ee29cebd75d22480911ffe50a07b0c
font_01_sfnt_off0000ffe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE0 14844 bytes
SHA-256: 62bef0a64971880571006dbf7cad9439835d768f4137487675565186810d93ca

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