Malicious PDF — malware analysis report

Static analysis result for SHA-256 8435858c1b3ede6c…

MALICIOUS

PDF

40.6 KB Created: 2020-10-10 18:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 69fe453f4c4ec282ace63cf6d6c82960 SHA-1: ee2523aedbc43561ee78cf758b23428c199d1527 SHA-256: 8435858c1b3ede6cfb1c8699b818969bbb13c27baf2b750e312014ab61c606ca
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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/pify?keyword=second+hand+embarrassment+in+spanish In PDF document text
    • http://zeviz.chenzbob.com/uploads/1/3/0/7/130739663/6032295.pdfIn PDF document text
    • http://files.gift2giving.com/uploads/1/3/0/8/130874124/6094702.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/2a1eca87-5b67-40c4-a5c5-39a1f60a96c1/senilaxipajawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53678864-baf8-4742-94fb-36405672b863/buzen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e7f9c3-fb93-4ad2-9aeb-bffe41758c7c/gedin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36cb5215-a9e4-48e7-a8a3-1ff420b64bee/kelibinunojigofasasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de9a006-0046-42a2-9c07-235f8d5f45ed/69434910277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8861/0215/files/foxin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8694/6212/files/trivial_pursuit_cards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2573/4552/files/holy_stone_hs100_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/20891170879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/748944847.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_off0000608f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608F 5524 bytes
SHA-256: 71448db16fafd88de4f58c38f22aa25a7e36bdf334adbb6cef498b9687304077
font_01_sfnt_off00007315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7315 10008 bytes
SHA-256: 3160dc80f717b7b89e961f3434cc182fa296fe06360f2c3f1bf27664c606c97b

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