Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0977ea8be7c340a…

MALICIOUS

PDF

76.0 KB Created: 2021-05-19 23:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 93fa06a671d1feb915c128992862044c SHA-1: 3c01df1b4e6f90979fbaca857b4983f4662ee6db SHA-256: c0977ea8be7c340ae115ff0d22e97d8cd4faea1d5fd8e0f85506277b628f4489
96 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page or download further malware. No scripts were extracted, but the presence of the malicious URL and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/strik?utm_term=how+to+operate+a+munchkin+bottle+warmer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422627/normal_60478ffd4d319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404757/normal_602d68cb9c074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458428/normal_5fd696fb23cb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_602b554fe3ddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502245/normal_6066d8bef2d8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388160/normal_5fdfccc36d03f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472182/normal_5ffa4482f036d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_600d5796bee5e.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/sixenogafopoj/google_drive_via_idm.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/rhetorical_grammar_8th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e173992-43b3-4aef-8a44-5993b314ad21/employee_performance_review_self_appraisal_answers_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2e8dae-d285-4045-a412-b3c82902591b/29561373391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c884419e-357f-4c34-951b-4f0158bf2e27/por_que_me_crecen_las_uas_muy_rapido.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/25124067.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/jasiwomiba.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/86345241748.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/19907984117.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/72339404715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0089e8-d25a-46b1-8c47-e629fb7def2d/bapokomaxaro.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/24708957901.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/zusokoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90666841-9edc-433c-923f-edbaee0570ef/begofibugokapaludimeko.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_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 5252 bytes
SHA-256: 51c9cf77108c358b07ce1aac27d3252d9a7621270912d7bf1edfffe513de8896
font_01_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 11304 bytes
SHA-256: 08405256adae7d604e91ceff4eb12be92a1884c9a3afd42ffda9ef7a23c4f166

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