Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd892a69e99b7313…

MALICIOUS

PDF

39.9 KB Created: 2020-11-08 19:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 71649c9c0e33b2e5d921a17cd0ea5761 SHA-1: fc18bb11a3e14782728ab0af7474f7bcef405412 SHA-256: dd892a69e99b7313f0ca4d73cc961c7bfe3aee2795a6ee5fc4e6dfcf70012c37
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://traffmen.ru/aws?keyword=awesome+tanks+1+theme+song+cool+math+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f89f903cb87d.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/joterige/caballo_de_troya_1.pdfIn PDF document text
    • https://gozevawu.files.wordpress.com/2020/11/valefegakis.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/treatment_of_status_asthmaticus.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://bitemifexem.files.wordpress.com/2020/11/2635721325.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://mepuzafasaw.files.wordpress.com/2020/11/megaman_fan_games.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/lozajuwifiwinabafapovife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/821026d8-d6f3-4079-8dac-ff832cef052b/61638607137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ee4df0-f7aa-4823-9dd8-636d9142bdc3/45262458161.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_off00006053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 5316 bytes
SHA-256: d7c198b0d6ecea3cc03a55ebd720a23e05918382793c2af812f1c69dc056327c
font_01_sfnt_off0000725d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725D 9544 bytes
SHA-256: b6cb0cbf15c67b73ba44039a7ef31610df7a96819f2d642abc3b1982fdae13aa