Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64a764f0f0e2b7c…

MALICIOUS

PDF

56.7 KB Created: 2020-11-06 14:09:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 02a5641e2aa887a497f60c07554aeb0e SHA-1: 7b12a9f242345ba20a80f531fc367a6210c59220 SHA-256: f64a764f0f0e2b7c4b88c48e69a0d1b7821e2ed7c5a381b1636fd7e415aa42a1
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://traffking.ru/123?keyword=golden+sower+winners+2019 In PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/vamurop-tufulagan-sapoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f8c9393d5163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5f8dc1c412651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f87fdaa632db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f87a8668be23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448986/normal_5f9dafeba0ef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f874f6aa60b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387586/normal_5f8d91ed882fe.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/pofejamudugobev_tekuruto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f977ade41332.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/d51c8cc.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/zarelusipofox/original_bhagavad_gita_in_malayalam.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_off00009cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC3 5212 bytes
SHA-256: b0e26145ca8908a9fb5e24cbcf0d2225fab587f1b00365e95cea4ea664c868a7
font_01_sfnt_off0000aea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA3 11632 bytes
SHA-256: 1f8d5bf566f8ecbabe63a9d0108b8e14c2cd5cc73771d4cb16a54c620852d726