Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97a46ee74b9b63a…

MALICIOUS

PDF

60.5 KB Created: 2020-12-09 10:58:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fdf4c4bcc8c1679aa16f6c1c860c7048 SHA-1: 18df5083a4a2a820f97a26bfb7c364e1a0d4f709 SHA-256: a97a46ee74b9b63a3632d05bd7965da63421791f75d72f06000376534db54571
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=compositions+of+transformations+worksheet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_5faa20dea67d5.pdfIn PDF document text
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/464230a35ef90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_5fa762644c0d4.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/mejisasemexa_mexidixuxoguri_pomadito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad478ef2-7dff-420f-a44f-c95df7a27f48/draw_the_orbital_diagram_for_argon.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/esc_guidelines_pulmonary_hypertension.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/viwixupalulojafiravimeb.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/comptia_security_501_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/define_the_term_policy_making.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/magazine_cover_template_ai.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/saketaf.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/21891935471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ba3cc0-74c9-4004-b66e-02f32dd3f6f0/48016694375.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_off0000b11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB11D 5308 bytes
SHA-256: 78328a8022ef64f91d55df4907e8f197828d3251af2fdf330622ecfbb177628a
font_01_sfnt_off0000c30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30E 9864 bytes
SHA-256: f31d8a8445cd4eb2dc7e70f3036d4bf1d24f5e1bf6e6fcadf60652f0a674c5e3

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