Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9015a5e835f823…

MALICIOUS

PDF

39.4 KB Created: 2020-10-16 21:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 71d112c12b120e46c503740cac0096d8 SHA-1: b0ad5540cb45a5f4cbd75ab33c68d8a36096fa2d SHA-256: 5c9015a5e835f8237f9602da863a42efacd72529d8cf1a8e45c94925c28c76d6
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://ttraff.me/123?keyword=spring+tutorial+javatpoint+pdf In PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/gisopinur.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/9886759.pdfIn PDF document text
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/910d9.pdfIn PDF document text
    • https://faworufobideped.weebly.com/uploads/1/3/2/6/132682851/tumuke-pavigibufe-gemezawivezave-ribow.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/mipemasefogexe-xurif-rezinurimojoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f88471ab0a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f87aae09862f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f8938c497a2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f87c02b9f864.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/55900.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f8906b78f39b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f88c7ed75707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f87b43c99e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8709d55c3e6.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://cdn.shopify.com/s/files/1/0440/1758/2230/files/case_law_examples_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7607/3125/files/vibiwewawawimoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1255/3374/files/soviwokumodegimavurubuvew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4157/8399/files/30863269931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7428/4446/files/the_firm_mckinsey.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_off00004fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC1 5032 bytes
SHA-256: 35ff0b5da70e7f79dc47d81b94f30c66965737eab4da1f86c89324e9447f494d
font_01_sfnt_off000060ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 9688 bytes
SHA-256: 44d8ef6d0459866cc6fbc04901c7e07eefe3c29a3a9a3d0ba2e20586cae50df9
font_02_sfnt_off00008219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8219 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333