Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a9d684f652cf03…

MALICIOUS

PDF

50.3 KB Created: 2020-11-02 10:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0dce8467a6186747a5ca1177286f73ed SHA-1: 1acb24e7f6d7934c216b5a6c157c964d5ab82966 SHA-256: a5a9d684f652cf03c992bf2cb2c06d89d91ef89b96b0e6b4a81b42d1b54f0036
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.cc/123?keyword=extract+full+movie+online In PDF document text
    • https://larogarokod.weebly.com/uploads/1/3/4/0/134018293/3794628.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/7e9e03d63e.pdfIn PDF document text
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/0f19e2175845c3.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.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/da7516af-6787-4f30-a01a-ef684006c6f5/the_exorcism_of_emily_rose_download_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c0ce0b-c2ed-461d-acae-61015b1cdc11/gepexelobava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb12019-c90d-42a6-9c7f-ce8229bc92ea/jufizadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed9eb18-9eea-434f-b12d-f74b7ceae733/36653368499.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/hillside_middle_school_supply_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5384/9499/files/16420877828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8517/8027/files/barrons_sat_book_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/9539/7789/files/35216461033.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/chuyn_file_sang_ppt_b_li_font.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb10e06b-7e81-4e34-a604-48f60728f9e3/municipal_solid_waste_management.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/ssrs_blank_page.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_off00008624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8624 4936 bytes
SHA-256: c58ed8be9028b50af9ff76992981edb9e4ad7717d46db3d060caef004ee2a89b
font_01_sfnt_off000096e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E8 11348 bytes
SHA-256: 3984639ae7f0d21d1f0817105f36c42b042ea8b0dbf7cec08faba85b51ed0c7a

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