Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8aeaf14e62f8e88…

MALICIOUS

PDF

82.5 KB Created: 2021-05-01 21:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4b6c9650fd0f03d7f8ee99bb8d3044eb SHA-1: dbabb756a5d38d2369af49f02eac3904ea86f594 SHA-256: d8aeaf14e62f8e88cc109c30b4218f664d09245cc6aee1c12f85e19080cf046a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a malicious intent to generate traffic or distribute content. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware delivery. The embedded URL 'https://maypoin.ru/strik?utm_term=what+is+peer+review+science' is a primary indicator of the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=what+is+peer+review+science PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461770/normal_60130fde9c186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_6025bf03e86e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5ffcb0c1f04b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_6016f5faec2cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393511/normal_5ff84a71893f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_605fa4d8caa74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416140/normal_60099ead5f04b.pdfIn PDF document text
    • http://dewemopiwofim.22web.org/evaluating_expressions_worksheet_5th_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_600ff8aa82cda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/werowibovezoje/john_murphy_technical_analysis_book.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/loctite_567_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/guide_to_machinery_directive_98_37_ec.pdfIn PDF document text
    • http://xikexugisomap.rf.gd/yiruma_chaconne_sheet_music.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_3207111d38654184a5923dda58e1b42d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisiku/kirkland_signature_7_hearing_aid_manual.pdfIn PDF document text
    • http://pazixurofuni.epizy.com/73796814609.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/how_to_set_time_for_casio_g-shock.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/how_to_connect_bluetooth_to_sony_wx-gt90bt.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/tamilnadu_attendance_app.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_c0edbee83df64b6ebdece16c15fc2aaf.pdf?index=trueIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_3d6b36bda66e4acbafcf5fb973251f69.pdf?index=trueIn PDF document text
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_a11cbecd973743ceb7c0c56d4ef84c0d.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D0 4832 bytes
SHA-256: f2adea030d41a4255e6082ffe1cd1f05f54e4f006d8dc22119bb42994c8bf2da
font_01_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 10588 bytes
SHA-256: c95f22d3478a1b6197bb678e91d3fa406d4de87d2a47eae487b90035f1ef6c62
font_02_sfnt_off00012e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E49 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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