Malicious PDF — malware analysis report

Static analysis result for SHA-256 478ecb5b43eaf61d…

MALICIOUS

PDF

74.9 KB Created: 2021-02-27 23:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9c5b4ea0a2fff7ceb99a07897d36aff9 SHA-1: e4792bf3e93817eeedd7de524e861c9695e6443b SHA-256: 478ecb5b43eaf61d69da6861c784d0f960e9f9a124c418b75a243c6240865953
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. No scripts were extracted, but the presence of the external URI is a strong indicator of a phishing attempt.

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://botokaw.ru/strik?utm_term=dnd+5e+holy+avenger PDF link annotation
    • http://desokore.medianewsonline.com/concise_introduction_to_tonal_harmony_workbook_answers_second_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_600c4b711b971.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_6007aa6bdbe9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_602c2437eba4b.pdfIn PDF document text
    • http://italylife.pro/mimivijetiruvajedekorox0ww2.pdfIn PDF document text
    • http://studytogether.fun/71759540794gr5zg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_6020fb1348442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_60276490a52d4.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/vikukinumet/groth_gates_sheet_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/vojisebon.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/24435253715.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/my_talking_angela_game_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/yankee_doodle_sheet_music_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/58400192912.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/do_salvation_army_employees_pay_taxes.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_off0000e7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C9 5192 bytes
SHA-256: acb0ee91a5eb0d38469e1df2b0ea23565ad41b337895b2e4dec008f88a6d1574
font_01_sfnt_off0000f981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF981 10764 bytes
SHA-256: e2b15f527bc5fd419cf4d9d828b7acfe2958ce52f74cc6eddb98b5b651931617

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