Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdafccff7dffb1e…

MALICIOUS

PDF

59.3 KB Created: 2020-11-06 21:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: fba224937df3bc92a2bcd66605502f79 SHA-1: 8b7e8f166106a1136f78f385b8ce350777d66de4 SHA-256: bbdafccff7dffb1e9fb9ad5fd5fb4b771b3d5aff53039a81f830fb941866e7f7
136 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.
  • 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://traffset.ru/123?keyword=skullgirls+mobile+annie PDF link annotation
    • https://mufanebix.weebly.com/uploads/1/3/4/3/134349193/9765953.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/xafud.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/wowexef_xidin_luledimowesesux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lewuli/23480449673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e1dd6d-4b2e-45d7-9ca9-656399986b91/44624944966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b3f448-84e9-4dd1-8d0d-ca0bf3d5da45/chanda_hahn_forever_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e9f2dcf-a5b1-4cd1-9883-f1aca759b14c/vifakifugugixavusibefu.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/unblocked_basketball_legends_76.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/moseruzurofamozedesowago.pdfIn PDF document text
    • https://zikivep.files.wordpress.com/2020/11/56664064325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1ec2dd-f657-4f60-b422-7c11274fcd9f/shoreline_jaulas_veterinarias.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 13684 bytes
SHA-256: 4ab7a5e4725dac0101194fcc2b2f5ae91019ca18ba163d1a0c9dfd3b616c6c84
font_01_sfnt_off00009b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9D 5116 bytes
SHA-256: 26b1b08e90fda12a17af0463e8bd8bd66db1ca35281b1be3c157128a7eea5ebe
font_02_sfnt_off0000acd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD2 10912 bytes
SHA-256: ddd738b8e3f02ca50437bc115f9d9e6368c6d93101142e5e958eb862b1b1b551
font_03_sfnt_off0000d20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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