Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d61a6f61345d6e3…

MALICIOUS

PDF

46.0 KB Created: 2020-11-08 02:27:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5a86ea07ff9a35e635b5101f85373b37 SHA-1: 7139baa43f4d768156732e963e422dbac26ad44e SHA-256: 7d61a6f61345d6e3bef07f0845d7aca6cf65ab37334aea2a884f2804212455b9
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=pixel+gun+apocalypse+unblocked+77 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403534/normal_5f9b9b6ea9f3d.pdfIn PDF document text
    • https://pikiravu.weebly.com/uploads/1/3/4/3/134347639/19c1eadd0bd.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.pdfIn PDF document text
    • https://mabogafopesusa.weebly.com/uploads/1/3/4/3/134307699/lujutifafazinu.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/9884818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_5fa60b48d084d.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/7526cc4d-e2ac-4251-94f6-b189d60058e4/rakex.pdfIn PDF document text
    • https://subonurage.files.wordpress.com/2020/11/7122347985.pdfIn PDF document text
    • https://pakukip.files.wordpress.com/2020/11/zavomovuxuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4979ac-aa1f-41ed-a477-1b5f64dd2070/kifuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562fae64-29bf-4766-94d9-79d854850214/74334399638.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8c8a6b-4266-423a-91eb-50fab2de8efb/21131549093.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_off000073d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D8 5600 bytes
SHA-256: 677f0d01a8b1139d4ef848e9e0a7fb12e9178600bf5d371618e2caaf55f1ddbd
font_01_sfnt_off00008713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8713 10600 bytes
SHA-256: c21a9bd60e023a7d7eeaee4f5ce39cba462909f584460712fb099f1164cd1f60

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