Malicious PDF — malware analysis report

Static analysis result for SHA-256 f668d4713237e4f8…

MALICIOUS

PDF

66.4 KB Created: 2020-10-28 05:31:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 32541d8e1ad9904ffed7981f566402f8 SHA-1: b0bd49096f0ed5b2bb0e8497b132dc4e254cfd49 SHA-256: f668d4713237e4f85fab5b6ababf8ee0e9c047a2bb339b504d7e7afea9c34019
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://gettraff.ru/strik?keyword=stoichiometry+worksheet+%25234+mass+to+volume In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5f8a25f45450b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f88969cbf612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f978aa834c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_5f8d8a4ec7c01.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
    • https://uploads.strikinglycdn.com/files/cf6f9d1e-bee0-4fae-9e2d-c7f0f02f36da/macroscale_and_microscale_organic_experiments_7th_edition_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8460e13c-0bb0-473d-853f-0b84b850b044/97771819268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c92aa3-6654-4305-b2b5-a2a6fd1e8d12/83085340966.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/foritejixuwuzisamekatig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a8fd955-70ef-4610-8d98-c1308a9de88a/29171663918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72bbf26b-386e-44af-a1ce-700880ccd401/modelo_psicolgico_social_de_veblen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d8f7f2-4b49-46ae-8d80-1f29e6431911/83176538369.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/oreilly_books.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/fusionner_pages_en_ligne.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/499515698.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/maulana_ashraf_ali_thanvi_books_download_in.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/22282069873.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/gloomhaven_rulebook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/o_capital_boitempo.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/sorubotudowasom.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E29 22296 bytes
SHA-256: c7e2e00cd8c3bf63461e442939a35e3b651bc378fdface029a04591ea4b999e1
font_01_sfnt_off0000b47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB47D 4840 bytes
SHA-256: 5105bf039a35c0a26309a633efe87adcb7717397c21e754ca1b79d2f6a044621
font_02_sfnt_off0000c4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F4 12120 bytes
SHA-256: d56a6a51151e692d1a763d53134b784f6829d1ca2bc586ca9806067e930096dd
font_03_sfnt_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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