Malicious PDF — malware analysis report

Static analysis result for SHA-256 259e94bc8e6681ea…

MALICIOUS

PDF

38.5 KB Created: 2020-09-30 00:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f205dc498769ea2e9144d3415fd7e6b5 SHA-1: 2cb72d13a780d0d47fafbf37ddd4bfc2e08e3d60 SHA-256: 259e94bc8e6681ea46b223a9603c6a0c30ad296ebc9ec65b934b55dde8a700ab
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://ggtraff.ru/strik?keyword=la+guerra+interior+jorge+baradit+pdf In PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/36210111312.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/geruzepopijuvilidufeb.pdfIn PDF document text
    • https://site-1037265.mozfiles.com/files/1037265/71385410924.pdfIn PDF document text
    • http://files.hilltoppreschool.org/uploads/1/3/1/4/131453007/278382.pdfIn PDF document text
    • http://pajigebur.semipermanentmakeupacademy.com/uploads/1/3/1/3/131384169/keredeteg.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/kakenekizateviwemamesujow.pdfIn PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/11506191581.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/83a2c29d-9ab8-4e26-ae76-c1515a205917/91712253912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf20ca4-1278-4442-9b3e-a289fa7a4f4e/lozugifiduze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cdb4a22-0f58-471a-a500-9bd194ed3550/64398793024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5112fd9b-435a-48c3-873e-ddc2d7be6121/gabejemukogiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aaee406-aee1-420c-8ecc-30330ded33f5/25409609743.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_off000059d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D2 5156 bytes
SHA-256: 493676f6e508a6b26697bb98eba9e757e9936c5fb6dfd626de3f4471807dc3d5
font_01_sfnt_off00006b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B73 9944 bytes
SHA-256: ac0b4ca29314bc2c3dbac4ee422f6c551027296d53e2f2b4515a94fe94fe64a0

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