Malicious PDF — malware analysis report

Static analysis result for SHA-256 55272d1c6835f8ba…

MALICIOUS

PDF

65.7 KB Created: 2021-02-13 16:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 71bb40024e5d993ee6e8b7990aae0ffa SHA-1: 2bb5ec401bd841dd2ab42adacb6563713ab18eea SHA-256: 55272d1c6835f8bacf63b150863a75584eb3edac872024c0c15f2f727531008c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wix?keyword=emerson+rosemount+5300+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fc5832b83475.pdfIn PDF document text
    • https://purabadixubemik.weebly.com/uploads/1/3/5/3/135399060/981473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5ff1bc0b2136e.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/khchUhd/tarot_cards_major_arcana_reading.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453129/normal_5fe1fcc427ec2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466175/normal_600215c37a2c1.pdfIn PDF document text
    • https://novatoful.weebly.com/uploads/1/3/0/9/130969934/wodonuvare.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/telij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413564/normal_6006e579dee5e.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/hjgf8ge/descargar_the_oregon_trail_american_settler_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_601b1aff04a67.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/hfV7gjQ/ninja_blender_recipes.pdfIn PDF document text
    • https://menegelobeka.weebly.com/uploads/1/3/4/9/134903334/6196201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5fdc3724c051e.pdfIn PDF document text
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/fixeweku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nowokil/1870155141.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/71925306682.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/beaver_builder_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/cisco_aironet_4800_datasheet.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_off0000c97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97A 5220 bytes
SHA-256: 9bebf7d056dbbfde55fe671843b635635b1521d68c5393513b4cdd271e314c8d
font_01_sfnt_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 9004 bytes
SHA-256: 59d306dc9f21d4fb6d4632d3e68eff0b2f1e61243afcfd7630827e02d2183a70

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