Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab8a4dee4826db4…

MALICIOUS

PDF

684.8 KB Created: 2021-05-29 05:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e4db2d0062bb9a415e061c239889b027 SHA-1: ad49fe361554690faa24b656c3d792e6da75cccb SHA-256: dab8a4dee4826db45ca1ef06ba686e47e3806dd02d17f4aba926a7a9179d533b
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 0.7810

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://mezovuduw.ru/strik?utm_term=monohybrid+cross+worksheet+answers+page+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464870/normal_6060311097a9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_603f4bbfb30ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_604b1784f2f27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423715/normal_5fe1a84f948c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489844/normal_606e2143bff7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_605f5e37583bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_604fed894d324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457298/normal_60635e4cb09b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410695/normal_6058d23f663db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_5fe8933c29ce2.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/3fcf5363-2744-4876-8e53-146eb156ff6a/90431266426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75056600-50dd-4ace-ae57-b6794906826f/11490218081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b786624-2025-494d-84e4-8ebf098604e0/4408791030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95d3068-84ed-4f7d-8da4-66a7454e2660/flexible_dieting_lifestyle_air_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e59d5fb-aae2-4eaa-994d-0d7d7205e53a/doro_1370_mobile_phone_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ff6e840-7e17-4fb9-95b3-19647d376357/nanda_list_2018_to_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/214e8976-e71d-425a-84fe-c1a9b0f6af76/present_tense_verbs_worksheet_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c86587-5f6d-4975-b89c-14c950fa44b5/atmananda_krishna_menon_quotes.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_off000a5f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F17 5836 bytes
SHA-256: d7f2568490fb67656e1befdf2ca29ddbd61066b837e19d1d302a12b347b39c3f
font_01_sfnt_off000a731d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA731D 13608 bytes
SHA-256: bf18bca9ca3a66c7945f1e279f0911ff0eac278960eb2f8d40f7b22cc12aef79

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