Malicious PDF — malware analysis report

Static analysis result for SHA-256 328a3ec588c16b28…

MALICIOUS

PDF

43.1 KB Created: 2020-10-19 08:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 89e743dc7e5ebdd1728e2d4740852b9c SHA-1: 77b0bad5977bc0aab22e33eca309f7fc401afe88 SHA-256: 328a3ec588c16b284627c2ab85367a8f154a3c224e1d53bce07ff76d7585b272
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://cctraff.ru/strik?keyword=lost+and+found+andrew+clements+summary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8b861ca0724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f87aa2c14d99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5f8d14e433199.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/pipefibax-melavig.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/ruxozukozuvazu.pdfIn PDF document text
    • https://niresofet.weebly.com/uploads/1/3/2/6/132682193/cf87ab801e7ddb.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/358353.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/loxatadawisuvid.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/tukefazigumikiw_roxenepo_kavas_venixuwu.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/5da837f468d.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/wonewodexaliduruweka.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/65d7b5b8-97dc-4f3a-99e9-ce032e3ad2f2/amway_xs_energy_drink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5215dfa7-4684-48d4-a8a2-ab6d46dd5740/xuwavuzof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1354995-4f9f-4c54-9b37-7fc1a53350f1/wixanef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ef25f1-1629-4927-9b3c-9fae3c49a748/tamavazemovujanerugenox.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_off000068ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EA 5304 bytes
SHA-256: d5d7b8d0f8b44270fcc5be714a7cd00d7deac64aae5b31a30f4230f9ac12c774
font_01_sfnt_off00007af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF3 10672 bytes
SHA-256: 2664f458114b05d46f9cc1a2b67141bb28e027fa483db47dee6f45bb5169775c

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