Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0b9c2f9eb7ab04…

MALICIOUS

PDF

39.7 KB Created: 2020-11-09 03:03:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d6c1ca884cd8f9a1d5707bb7eb09152f SHA-1: 97a7fe7a8de6ff1795a2caf94ab65b18b2bcb706 SHA-256: ea0b9c2f9eb7ab042c03342f5737eb0edac9814f67eb5412ea58457cb5fa26df
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/wb?keyword=facebook%20messenger%20apk%20download%20for%20android PDF link annotation
    • https://xisaluzesa.weebly.com/uploads/1/3/4/6/134602292/4924144.pdfIn PDF document text
    • https://gizarokidobibaw.weebly.com/uploads/1/3/4/3/134363860/3cfad1b1ef3c8.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/2489123.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/wovigebi/my_time_at_portia_museum_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/33728408346.pdfIn PDF document text
    • https://bafelego.files.wordpress.com/2020/11/52078251363.pdfIn PDF document text
    • https://danopoxuvava.files.wordpress.com/2020/11/nahuatl_diccionario.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/dejerifafakavituw.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/54062972792.pdfIn PDF document text
    • https://kejepototoga.files.wordpress.com/2020/11/86720874390.pdfIn PDF document text
    • https://konomalipu.files.wordpress.com/2020/11/91115782662.pdfIn PDF document text
    • https://pupigebogom.files.wordpress.com/2020/11/52847989734.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_off00005ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD5 5724 bytes
SHA-256: e66bd5107b339c6d9d8fe40ef6b868e960aad42b0401bc46bd7ffe75d4493289
font_01_sfnt_off00006e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E47 10444 bytes
SHA-256: a9ef6b8b57be0f630a1f9cc51b1ec605c2ea5f32b7abe764897e5fcb9ce98cdd

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