Malicious PDF — malware analysis report

Static analysis result for SHA-256 29928c8187e66383…

MALICIOUS

PDF

74.3 KB Created: 2021-03-25 01:14:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e9f7bb54d10653459df97d292096d9c5 SHA-1: f4d44860a553e402135566dfa1a6116c8b927037 SHA-256: 29928c8187e66383f08508bb84069c9f3848529f56628ebe4b104de94b4c4c98
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'botokaw.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'data science book pdf'. No scripts were extracted, but the presence of external URLs and the ML detection strongly suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=introducing+data+science+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465565/normal_602c596aa0d6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_6023c91c21b81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392872/normal_601733962bc52.pdfIn PDF document text
    • http://niwagiw.22web.org/bezajezifolam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421471/normal_5fd950a974e0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470836/normal_5fde8a176b8b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471106/normal_60434fbe940d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5fcf5ea6a9c71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372707/normal_5fe0b86d2ee7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_602f1cae597c6.pdfIn PDF document text
    • http://lujadexezusunam.22web.org/85428358399.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/patotale/what_is_feminism_in_literary_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/16098139529.pdfIn PDF document text
    • http://faberaladaruz.epizy.com/equivalent_fractions_tenths_and_hundredths_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/the_search_for_abraxas.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/defasenexaruvixez.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/pewamixuwomarix.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/how_much_does_an_emt_make_in_tn.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/capitec_multi_loan_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/font_aksara_jawa_hanacaraka.pdfIn PDF document text
    • http://kikanaxop.rf.gd/4527547752.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_off0000e4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 5432 bytes
SHA-256: eea84cb1d1b48e84b99877f4b53c6fedeb4104df2f7f5d66a2877c02faf74e45
font_01_sfnt_off0000f748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 10664 bytes
SHA-256: d11c4dc5c54d0d10b86d6ddc4bab9fda750ece5e51da97f0196869b4f474df03

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