Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc5277c53289ed9…

MALICIOUS

PDF

47.3 KB Created: 2020-11-09 03:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ef29ecd9197dc6f33e432401d1bb2be6 SHA-1: 0e16360ab7256a3b2bc68ca64eccc832d6531982 SHA-256: acc5277c53289ed9f2fc149d024cd9905dbb1c96e4bb2185300f862e6cb493c6
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://traffmen.ru/123?keyword=meg+ryan+plastic+surgery+repair In PDF document text
    • https://sowofinonapira.weebly.com/uploads/1/3/4/3/134361296/kemavuxudixil.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/lojovefukajevipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8dc1f2788ae.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/2061882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_5f94136c683a3.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/luwowux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://mukiwubira.files.wordpress.com/2020/11/15682843718.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://zotoritox920258296.files.wordpress.com/2020/11/12788533416.pdfIn PDF document text
    • https://kakaruwosoma.files.wordpress.com/2020/11/poxomumivenakozepufufurif.pdfIn PDF document text
    • https://xelinatuki.files.wordpress.com/2020/11/12873235441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c43e16e-011b-4e77-8052-0b139eaf9ffc/lewis_dot_worksheet_for_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/avatar_the_last_airbender_comic_download.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_off00007bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF6 5208 bytes
SHA-256: c1f0be52d91c1541375f9ff9cc2ffbc014a97d4ce4bb53d68d6898e9e5550131
font_01_sfnt_off00008dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD9 10188 bytes
SHA-256: 0fef25f087c293ddf30c3f006e1a4ba64b1df874a2ade8038ce68fa8e0550ec6