Malicious PDF — malware analysis report

Static analysis result for SHA-256 84576b7dfe2d37f1…

MALICIOUS

PDF

47.3 KB Created: 2020-10-15 07:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8bc00bf728da65efe1fc73d089010b18 SHA-1: f85399c76c1fad994a7e2b03a165424a56e25584 SHA-256: 84576b7dfe2d37f100989f55cef8a341c81ebd3e61c81d4d57a4d1685d5aa17a
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://cctraff.ru/strik?keyword=geometry+dash+hackeado+apk+descargar In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/kezupukono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f87a99757361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f87a2ccecafc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f87590c52218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f87b8bf4a5ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f87afe442dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f874309530cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f878832b8733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f876e10a6ad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f871502801f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f87147f16513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f8750ef63ded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f86fa49d5bc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8701ede58e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f87bea7b6e71.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/tilitusawe_bamerapex_wavotokawekeg_rifaligiboda.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/pumupipi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2153/1293/files/zulusolasezevetemugopuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8683/0496/files/wibakoxolexopana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7782/3385/files/mokenepolese.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F10 2880 bytes
SHA-256: b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167
font_01_sfnt_off0000794e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794E 5652 bytes
SHA-256: 305ab061b47185332ede727830c88584faddf3bae86c034741ad62e6f9c841cb
font_02_sfnt_off00008c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C75 10228 bytes
SHA-256: dd4d6ff25b68d687bd6f391ee3646ef4743e75508573fb02c263d273580fee94

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