Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9bd84541538904…

MALICIOUS

PDF

47.0 KB Created: 2020-11-04 18:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0b7c0303b010ddf2a40c2c8f6af80bae SHA-1: d5c7b895e3e6d9e1fe3f3cde54feb0ef77cd1051 SHA-256: eb9bd845415389042fb2477144854315f30a0c20e0a9e6d0bab275aca78cfda1
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.ru/123?keyword=nuremberg+trials+apush In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f9fe4739b5f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_5f92a73d9dca5.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/kepus-nadig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5f9b15c7a8ab1.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/jedazuroxelex_xepitos_zetujigolevejem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f88988625f15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8724b56917a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/desiriri.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/jurnal_medan_listrik.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/gaxufigiditonirimesit.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/cbse_5th_grade_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/la_benevolencia_de_dios.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/chemistry_book_class_11_ncert.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 5340 bytes
SHA-256: 6efa789a9a882ca77c9fec6fe2fbfef530576f330cd805b8e4310b3ccf5fac5d
font_01_sfnt_off00008d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7D 10048 bytes
SHA-256: 25c5d7a24d4eb4c5a9b01fa1fb0565c58ab75d6d1a0c973eeb69182b646aef36

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