Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c98cf9795534ad…

MALICIOUS

PDF

79.6 KB Created: 2021-02-14 07:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7ff854ad03881f428b0ad93ba06602d4 SHA-1: a6f35a8a29eeeda071542af30362d2f981144848 SHA-256: 27c98cf9795534adc72607272cd755ea628629367fd71e24d4bcbd2faeab1aa9
96 Risk Score

Malware Insights

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

The sample is a PDF file detected as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into clicking it. The document body, though heavily obfuscated, appears to be related to search results, reinforcing the phishing lure.

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://druttle.ru/wix?keyword=guild+wars+2+armorsmithing+discovery+recipes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501479/normal_5fd84a2ea48b9.pdfIn PDF document text
    • http://gnatural.space/t_mobile_sidekick_4gv68en.pdfIn PDF document text
    • http://discovljzg.fun/11796264244zacw7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_600ba104cf582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_601736206e239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_601682c7074ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530910/normal_5ff41bfbba066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_600c04599e08c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_60286398c1ae8.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/zafaronivaj/milexewepodiwofakuwukebo.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/53645509883.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/audit_report_wording_comparatives_not_audited.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/a_g_c_r_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/comida_saludable_recetas_faciles.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/navkar_corporation_ltd_annual_report.pdfIn PDF document text
    • http://worubag.epizy.com/93133436507.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/bekemazotosemem.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_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 5904 bytes
SHA-256: 28983b3b2c031e2f35b4906b3a9d10aaad46ad3138f9f45641c7dc566657b5e4
font_01_sfnt_off00010dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 10616 bytes
SHA-256: 60230502a019fb23a4002a7aaa9a1f5bdf32cf2ee208d2f37c511bb5e7794eb9

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