Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e093b243a5bdaa…

MALICIOUS

PDF

69.6 KB Created: 2021-03-20 22:07:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 532ef68b9988d775a42a5b82175bf85a SHA-1: 6c01ab778cb41c57e73d59c76e06db088cef5aa8 SHA-256: a5e093b243a5bdaa306e54f684b168411f073421cced2fa45ba4b1466bc88f46
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a potential lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/award?keyword=career+path+worksheet+pdf PDF link annotation
    • http://devgame.design/vinejekeur9o.pdfIn PDF document text
    • http://genusttwsr.fun/driver_booster_5_pro_serial4nrty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467017/normal_603cb339e5fad.pdfIn PDF document text
    • http://luzikudejijes.22web.org/ipcc_2018_report_summary_for_policymakers.pdfIn PDF document text
    • http://nuvoked.22web.org/74812816481.pdfIn PDF document text
    • http://tukiviretek.iblogger.org/17897154272.pdfIn PDF document text
    • http://chestlune.online/sugobamakodakakomatva17i.pdfIn PDF document text
    • http://apparently-home.com/bupedejami7ghps.pdfIn PDF document text
    • http://faxozulakevosos.iblogger.org/prefix_and_suffix_worksheet_4th_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_6027405b1bd20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_9cccc7dc4979455eaee56dec4dabe1e7.pdf?index=trueIn PDF document text
    • http://tebalakafepikob.rf.gd/mcna_caries_risk_assessment_form.pdfIn PDF document text
    • http://pezokom.epizy.com/buwuk.pdfIn PDF document text
    • http://zarevamemamafo.rf.gd/referencias_bibliograficas_abnt_formatao.pdfIn PDF document text
    • http://ropurudowilume.rf.gd/dagusiwewajetikuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/948bb8ed-a81e-41d4-a11b-a9095e7052c8/12922769981.pdfIn PDF document text
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_274c0f8502f246d9874972dd0f9877f5.pdf?index=trueIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_dc74d5c8a2f14cccaeea39768ec6247c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bc33e83-9588-4fce-bf64-f5d8b0c9d4b0/what_is_real_analysis_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0481c507-b9cc-4a18-8616-086d776170b2/womens_black_levi_boyfriend_jeans.pdfIn PDF document text
    • http://tarojiwisow.rf.gd/how_to_win_an_argument_with_someone_who_is_never_wrong.pdfIn PDF document text
    • http://kutezowifemiwe.epizy.com/river_wye_canoe_guide.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_off0000d4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F6 5160 bytes
SHA-256: ec63b9542317129f09fbd92b2b6c54ed27f5c44dc1b025c86e894fc0b7fea3ee
font_01_sfnt_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 9992 bytes
SHA-256: f6df1ef1d84c7e4791361b88fa8ac6e725d996a5b69cc1cf5bfa392d26c67f8f

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