Malicious PDF — malware analysis report

Static analysis result for SHA-256 8321a39896c82392…

MALICIOUS

PDF

42.1 KB Created: 2020-11-02 06:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 19981cbd91da9a7a11c80301f2f4ec79 SHA-1: 1b95701ab4ffff6bb75b4ca13d3b86e2e58e950e SHA-256: 8321a39896c82392fd617d8ed63b81f9be3025982c92b988ed936323abf378d8
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=exorsus+raid+tools+wow+classic+addon In PDF document text
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/8056065.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/2710438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f95094298c4b.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://wilujogid.weebly.com/uploads/1/3/4/3/134347442/1849776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f89ce7d7eafe.pdfIn PDF document text
    • https://sejejuno.weebly.com/uploads/1/3/4/4/134447194/9339010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ade1c90-4817-4256-bca0-c1c54e93eb22/15479820419.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/30357941354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f71e0de-7188-4f46-a7e9-224f8ddb1791/81227767539.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/multiplication_box_method_worksheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/advanced_english_vocabulary_with_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8400/8603/files/19722579289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0832/6313/files/gigotexidarerod.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_off0000651e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651E 5052 bytes
SHA-256: a5c734f27c025526c39c9012882a0fea61b4ac12f86de0616b1e8246d758c962
font_01_sfnt_off00007670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7670 10968 bytes
SHA-256: 689942bedc661e4220a37021844a387a7cce9fd4a254f8dccd76f5bd9e8bf7d6