Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55f2cb16ac73f39…

MALICIOUS

PDF

63.6 KB Created: 2020-11-07 02:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 87ba9cb52e7e4431df3451b6afe28d9c SHA-1: 1154d689f5c653af3771e1e89e6e8c52bf07f8bf SHA-256: e55f2cb16ac73f39973f38e7bbc085b6305a290c0a6856d385f561ea4fb360ef
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=soil+boring+spacing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f89ea96823ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f9dbf94445a4.pdfIn PDF document text
    • https://zoroxazug.weebly.com/uploads/1/3/4/6/134614170/97c73a06b514dfc.pdfIn PDF document text
    • https://veraroligesabo.weebly.com/uploads/1/3/4/3/134377370/8636109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/shades_of_meaning_worksheet_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2667b00-d6a7-453a-bc6b-0ec85b1edbef/topenidikekiwobefome.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/fiboridukegifow.pdfIn PDF document text
    • https://suxitasud.files.wordpress.com/2020/11/96964264682.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/penogugikawi.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/wudufu.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_off0000b78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB78A 5344 bytes
SHA-256: 0ac1a58713a49783975d324d720d5069ae1eb7dd28ac7d1bc3eb3d51ccc6866d
font_01_sfnt_off0000c9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C0 11372 bytes
SHA-256: 220694b1173382fc718843ed17d8f8b078f57feeeddfea10e3a0235a44e72e82

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