Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51ea00d8c76f3f6…

MALICIOUS

PDF

80.1 KB Created: 2021-04-17 12:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9d3d006efc9881db197d2bba514c209c SHA-1: 31cc5d9d726ea06b4fc1605fa41b62eeeb2eb35e SHA-256: d51ea00d8c76f3f66a7b6448742152f44b46a341e10bc24d70aaaa2ae67318fb
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://seumenha.ru/strik?utm_term=police+interview+questions+and+answers+pdf+download PDF link annotation
    • https://cdn.sqhk.co/rokunufoleti/geshfoI/old_pc_video_games_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/rokajoten/hgdk5qD/xevuwimutobawefopinex.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuluni/heKRjdN/85185925418.pdfIn PDF document text
    • https://cdn.sqhk.co/xukigipeduve/XYBhctK/aptitudes_y_actitudes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486765/normal_6033b2a7f219c.pdfIn PDF document text
    • http://pasipodo.mypressonline.com/25115281806.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/bqhcfgh/scholarship_essay_header_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_602b3757696ef.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/WhbOAuu/nhl_standings_playoffs_2019-_20.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/algorithms_for_interviews_download.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemevimox/jg2e8hi/nail_designs_autumn_2020.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
    • http://bizedesaxifu.onlinewebshop.net/algebra_lineal_7ma_edicion_stanley_grossman_solucionario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14045e01-3b6f-4a4e-a6fe-f4eb9ce23157/83630873581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368a143f-799e-4cfb-b695-5b747bce7aae/66696928071.pdfIn PDF document text
    • http://kibagog.onlinewebshop.net/ketogenic_diet_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc7d87c-2ae4-4659-aea9-d7c96e428a5e/20278134146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba274eab-1a72-4779-8c69-bd4143edb219/27105647226.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 5312 bytes
SHA-256: 0b6ceaa4aee0b93d942e01fe0def0920fdc6ff50b8ecb5d58388e8d0574a0e44
font_01_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 10816 bytes
SHA-256: 1b7a886b5ef4bb93659e2f0af69ddc88111f7a5ab3ceea90d17fc8e7d1f68c6a
font_02_sfnt_off00012580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12580 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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