Malicious PDF — malware analysis report

Static analysis result for SHA-256 724bdf5fb706a6be…

MALICIOUS

PDF

83.7 KB Created: 2021-02-22 18:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 608b4e54d32780b46ecde91d741e1e23 SHA-1: d468685433ef4bfa923f1db1fff3cde1f0796d99 SHA-256: 724bdf5fb706a6beaf300fd9725a231729fc04c86aadfff381974bc1cbea17b2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/aws?utm_term=percy+jackson+the+last+olympian+movie+release+date In PDF document text
    • https://ximabetewu.weebly.com/uploads/1/3/1/3/131384229/wokis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458421/normal_600f9fcdb27cd.pdfIn PDF document text
    • https://tedetoxemerul.weebly.com/uploads/1/3/5/3/135311624/xejuwaxemewivotiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5fff5e13d018d.pdfIn PDF document text
    • http://m-ryanaf.site/crecimiento_exponencial_bacteriano3pym0.pdfIn PDF document text
    • http://uber-global.com/16183522009p8qeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366652/normal_5fe427bbb26ac.pdfIn PDF document text
    • http://magnetfix.store/clinique_sheer_shimmer_cityblockk7euk.pdfIn PDF document text
    • http://reduslim-ufficiale.website/bassaleg_school_uniform_shopeeasw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503533/normal_6018e8823d2f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410416/normal_5fcb9ad0b177e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_6031183bde209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_601ca6d1aa95a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366004/normal_5ff5da56a6b11.pdfIn PDF document text
    • https://rugexosijebup.weebly.com/uploads/1/3/4/0/134017508/melawasagor_kodunitase_suxajezomeji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001052e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052E 5616 bytes
SHA-256: c1524ca2e647704fbea75a8cfd2b3e4c698149a40894dbd5c384276c2feacdf7
font_01_sfnt_off00011836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11836 13048 bytes
SHA-256: dad5faade0dd1670643d0f5ea7ed3afc48ce41615dce8165e56830ecc07680b9

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