Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32350832cff79b0…

MALICIOUS

PDF

37.5 KB Created: 2020-09-20 05:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d8bc07ef6ed5a4c733d07a9c57a4a67e SHA-1: 32e7c950476439ceded0c8d508b2c8b1c1ecf68d SHA-256: a32350832cff79b0655dadbcc34b398bc82b2251d0bb84f4a845aa86374a4012
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/wix?keyword=monster+hunter+world+how+to+get+vip+joyful+tickets In PDF document text
    • http://nizugova.laposteperry.com/uploads/1/3/1/4/131437875/ff0e6099ce6.pdfIn PDF document text
    • http://files.robinjohnstondesign.com/uploads/1/3/1/0/131070313/roginuni_sawilaseb.pdfIn PDF document text
    • http://gafeba.genefrankeltheatre.com/uploads/1/3/2/7/132712019/1dc5a94.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/1/0435/2117/9816/files/death_s_gambit_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/cancer_sarcoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8422/2116/files/sargent_jump_test_explosive_strength.pdfIn PDF document text
    • https://12825d6a-2aaa-41da-88aa-b22fa69d6aee.filesusr.com/ugd/3fc21f_445584fed51a43f0a1e9dd3be3fb6886.pdf?index=trueIn PDF document text
    • https://5b75ffda-babe-4578-9156-ea745f8dcb55.filesusr.com/ugd/2c7c49_9a4dbc93764646c298e33f6766abb4c9.pdf?index=trueIn 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_off0000522b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x522B 5608 bytes
SHA-256: 106bc19ee418ad382380740ef82e79b2c9f9ea0fbb9633dce2dbe0d8a6eb6743
font_01_sfnt_off00006567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6567 10516 bytes
SHA-256: 3805bb5d46f3160f9d661a72529c90689656c3b08fc1e16575ce22dd74cf757a