Malicious PDF — malware analysis report

Static analysis result for SHA-256 655c6a4268107a97…

MALICIOUS

PDF

51.2 KB Created: 2020-11-06 20:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 92a2be054a5658b8d246c0f34baf8623 SHA-1: 809339f664f7b17790d68505d5dd4c94c2b761ea SHA-256: 655c6a4268107a979b131decab620e5b5f731a2a7ecd9fc27d2e9f9699ead2cd
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://traffking.ru/aws?keyword=text+me+mod+apk In PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/degogedego-dojidetudi-zuwixeva-wedupojopofege.pdfIn PDF document text
    • https://luwinititik.weebly.com/uploads/1/3/4/5/134587042/6507622.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/101086.pdfIn PDF document text
    • https://favasebuwakule.weebly.com/uploads/1/3/4/3/134328846/87d4445b7483494.pdfIn PDF document text
    • https://zozesikijep.weebly.com/uploads/1/3/4/5/134586683/740742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f9f0a8328a83.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/7992784.pdfIn PDF document text
    • https://nonudefetug.weebly.com/uploads/1/3/4/3/134314303/7317763.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/kedoxezezaj-temolej-zunemalavorun-mutelokowomimi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f97d6b8ea6cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tigovatolis/63582171648.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/html_div_to_jquery.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 4516 bytes
SHA-256: b4d90b6f5a943a6d86128a93eb7452d816dacdb5c2e7237047e26ac8766dd295
font_01_sfnt_off0000739a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739A 11248 bytes
SHA-256: 7836cbe30f234f8acb550945511b00a7dce72f413e9e9d348376be82ebea9aa0
font_02_sfnt_off00009a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6C 16444 bytes
SHA-256: 970e02c8b8d1b843c20887c210394c45d7242588314f57d3158b52381034e620
font_03_sfnt_off0000b0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333