Malicious PDF — malware analysis report

Static analysis result for SHA-256 2088f9e969cebccb…

MALICIOUS

PDF

86.6 KB Created: 2021-02-16 18:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b10a73ebac1f26a6c6704a74467f912f SHA-1: d4a8fd38f140f3771fdcc307b41978dc7814d558 SHA-256: 2088f9e969cebccb3a0b3f373af0484fd3ba185acc01148467ddf7500dd97f4f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded external URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The PDF structure itself appears to be intentionally malformed, with duplicate object bodies, further indicating malicious intent. No scripts were extracted, but the presence of external URLs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=emma+zunz+cuento+de+jorge+luis+borges PDF link annotation
    • http://fuxukibegub.iblogger.org/detective_conan_theme_violin_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457573/normal_5fd627ad7ee2e.pdfIn PDF document text
    • http://itgermany.net/wishlist_download_wish_listhhnym.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382407/normal_60070b8cf09f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370265/normal_600112015e263.pdfIn PDF document text
    • http://lodixewovufosa.iblogger.org/56743410810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367281/normal_5ffc8f2c570eb.pdfIn PDF document text
    • http://vrestoran.info/tower_defense_games_unblocked52jzu.pdfIn PDF document text
    • http://gravkamen.ru/hssc_je_admit_card_linkp9zvb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5feccdb9567db.pdfIn PDF document text
    • http://timecodes.net/2361083126m64nv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_6011c9251b72b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_5fdb044dd7afa.pdfIn PDF document text
    • http://bavunexebiri.iblogger.org/xaweda.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/xufaxoferugod/automatic_fire_extinguisher_robot.pdfIn PDF document text
    • http://xozelabudizi.epizy.com/29817064562.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/bitejagi.pdfIn PDF document text
    • http://fugawinovijes.epizy.com/lerusojuwivewutudipijip.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_off000112ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EF 5480 bytes
SHA-256: 5e599500b8bf83f6b267a3af897c3bd11873c3ca6acbcac372982ac48cc85f45
font_01_sfnt_off00012583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12583 11564 bytes
SHA-256: b91686204c696cdad67f1cafefd996ce663aa9090f500d63fcb2911b91fc6acb

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