Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17b296603d7e7ad…

MALICIOUS

PDF

66.0 KB Created: 2020-11-03 06:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 51981ec44ccfd7fcd5b2a855866e686a SHA-1: 7584588babd0dbb5ec47ee7d74b35adad32a9f94 SHA-256: c17b296603d7e7ad16f279e1bccec052fb9fed310317da81cc77ac6f7a42680e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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/aws?keyword=dare+to+lead+brene+brown+summary+pdf In PDF document text
    • https://pagofere.weebly.com/uploads/1/3/1/3/131398194/8e4e5705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423471/normal_5f983ad9ab629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f94cb0c097e1.pdfIn PDF document text
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/digarajuduzegak-nalobinato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f9caa392ec9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f8a8540bc954.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://s3.amazonaws.com/memul/5913455205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5291/9703/files/98392761064.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/mufuwidatisupu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/the_raikov_effect.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/say_it_with_symbols_investigation_1_ace.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/2668809516.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000a48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA48E 6548 bytes
SHA-256: 4200db6c0e80cadcb5e6095e2db64c6b33cb2c0480475197fd4329a98774db8e
font_01_sfnt_off0000b4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E4 5352 bytes
SHA-256: 4c8c5b9d4e67d8b7a5e1ed97b2677f7ebb4162851399aa8ade9d81bdc8792ed7
font_02_sfnt_off0000c711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC711 11344 bytes
SHA-256: 2edcf6e12020e4ba084c56ef260019fa0a1a34886c611dae380503246ea07c2b
font_03_sfnt_off0000ec87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC87 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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