Malicious PDF — malware analysis report

Static analysis result for SHA-256 1149dd8d7bd22573…

MALICIOUS

PDF

43.3 KB Created: 2020-10-31 17:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 58659ef2f505f35751119b4dec11aeff SHA-1: f1d149dbd71a2cc7eea232edb980d59dd3264bb9 SHA-256: 1149dd8d7bd2257336eebc512ee3eddadeffc6015428dfa3983450af4b190992
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=no+child+of+mine+trailer In PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/5615478.pdfIn PDF document text
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/3194435.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/xigurikikimotexejo.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/jamokaroxoj/pamimojizesuvixonoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f3c44d-d7ff-47e0-8c74-8da5d0f4cf7f/ligofisinurokezexebidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe98588b-269c-4b83-b652-a1848c3f3324/15669437683.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/best_of_r_maliciouscompliance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6bf8c1b-62e7-425e-88a7-0e3c8210d566/ludulegodegime.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/download_solo_leveling_novel_indo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7104/5277/files/principles_of_effective_delegation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1443792a-8613-41a5-b149-8db8a19bb1d5/ya_problemleri_test.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_off00006aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACA 5052 bytes
SHA-256: 4e6d1a4adfca11d77df2475c1920bb5b3aa036d184cde7e5684a6ea4d98dda8f
font_01_sfnt_off00007bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCF 10892 bytes
SHA-256: ee7bc8501175767435070fc4504fd503dd08eeb72818fbf5ac8e0699cc9acce5