Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae0251beff67ab3…

MALICIOUS

PDF

45.7 KB Created: 2020-10-15 10:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2beb7b757b030cbb8482ace4d764b059 SHA-1: e7c6eff0a377e09374a1d329a34673b46398acae SHA-256: 9ae0251beff67ab33ae99d2e81e3fe954c28abf493c95dac61166f7122086458
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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/123?keyword=download+ios+keyboard+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f87bf24a324d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f878b109d97a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f87a21cea66e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f87f4b254826.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/vixezuxapa-texewenagig-dewuxukazavi.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lukuxaluk.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/jilakimagib-nenosi-bofuzinawi-kiwodifizuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6040/4646/files/vosobixejutipub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8612/2660/files/12129612005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9710/6848/files/xapijalozedavukumirido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/liu_chunhua_chairman_mao_goes_to_anyuan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/crisis_hipertensiva_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8934/7228/files/23319596288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ab7197-4172-4a72-855e-925ccb3367b2/89082189149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4925c3e-c9bd-4106-8df0-1645168e35f5/pexurilagemililuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1692988-5cf9-409c-b0b4-61261cc42b4f/lubovarevuxofimunovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890253d1-9fdb-4be1-baa5-41793f45ad54/pupisopisizodegijogelofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21316af8-50ff-455f-9737-a2ca81a7f86e/takujuvugigiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/286c7f64-2c4c-48bc-99b8-0dabd0077e78/70877025080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77bdbe6f-8a81-4b45-9588-a5d2784e8917/41960034624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8e97fa-746f-426f-be69-d0d5c23b9fdc/78336324987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1a7e33-c63a-429c-825a-e9aef98ca122/nawabewunudolatifuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f5e186-e0dd-4354-b1d1-dbd42fe21a92/7564514123.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_off00007325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7325 5300 bytes
SHA-256: c9c8ad10e52d523bef2ed85d4db3427385eb493c891a772eb62e3832480ad706
font_01_sfnt_off00008550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8550 10404 bytes
SHA-256: 1a8ad8e2b8e8a51846b65ad316ee87bc389e492277b68ee68b767a17c78b6d60