Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b44cabea86fb5f0…

MALICIOUS

PDF

46.1 KB Created: 2020-10-16 08:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 24877707e682bfc4cf3f42101fe19fba SHA-1: b0ab5036c2de953c2ee3c9edca0fb3c677251325 SHA-256: 3b44cabea86fb5f02d17dee787554cfe3dc0b1f88279a3563de0c35713896fe8
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=the+billionaire+boss+next+door+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f870a4df379a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f87e53bae693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f88dff24bcdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f893337ef759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f88a8dd04dc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f882afdcf65d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f871d5d5dbbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f8906b21b1ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f872ae8f20b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5f88c61bb9074.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/sulifip_bimewu_wevobami_fivixibileso.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/4211600.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/6404364.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/35b4bb2c-cdbf-4db1-bdeb-872c47983f8f/naneporozikimidozivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4ac827-daa1-4f1d-a77b-5e8fe96ad9fe/83769011021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e299bc8-65c3-459d-88d9-22f1525c2c57/zukovidolowigilewelof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0df094a5-cec4-46f8-a486-257d16f2b751/liwaputezowiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6141d20d-d7c1-49b2-9794-ae32b96113ec/falifamonemifewewipuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b61ff31-454f-474c-bdbb-36c20cab21e4/kajepobekifojipibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5a38a4-0ed5-489d-9e59-fb68ec9a3e1c/41090823906.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_off0000757d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757D 5288 bytes
SHA-256: 0e9ac70fdd3b0aff0605bb2de17b02f88c555a3e5d4f85f3c9bc0f9149162887
font_01_sfnt_off00008766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8766 10676 bytes
SHA-256: 00d271953fc200618b1cc8bd0413762597ab121fbd8338f8a5f60f6726209851