Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4b0b48e50dd47b…

MALICIOUS

PDF

41.9 KB Created: 2020-11-07 06:07:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 00f6e1c8df52d465b9e652379cf61827 SHA-1: 93d6eb0f95c6fed2fc5544c3aced4a7c4dd81aba SHA-256: ca4b0b48e50dd47bfc0c5d4027dd846ff0477f506c3c204d71494e674cbaac6d
94 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 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 1.0000

Heuristics 3

  • 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://ggtraff.ru/123?keyword=structure+of+the+atom+worksheet+answer+key In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/ripaxasutelafofixezonek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf9daf1-e24f-4d6c-b4f6-76f7f717c516/covalent_bonding_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/bozadabesir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d7929c-2128-4bbd-a025-cf0f602b5765/53369885479.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/diamond_carat_size_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5049792-17c4-4743-850d-eac4846ad989/elementos_de_un_reporte_de_investiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db34368b-db83-4863-9f13-af7da9bf4236/okcupid_disable_account_payment.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/ayat_ruqyah_syar_iyah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d48c4c8-c021-4ff0-93ed-cafdd200b52c/97647305296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07622bab-60c7-45be-9ca5-788620a24944/rural_king_coupons_march_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/nfl_collective_bargaining_agreement_vote.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/mr_nicks_sub_shop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4cddbff-1cd9-45df-a1f6-808577e96fd3/learn_more_about_dragons.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/xapotumemeligok.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/final_fantasy_14_mining_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_off00006484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6484 5452 bytes
SHA-256: 63a4974eab7f12efe0366e68ab7729b44cd74d5b5e468b5c5bfcb0ef0dcd1a96
font_01_sfnt_off000076fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FC 10316 bytes
SHA-256: 85ff64214e02220a91a72bc67b1f9b50b14bbd32842bd6e0bfc9f3ff9e45814e

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