Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4d00e478194698…

MALICIOUS

PDF

49.9 KB Created: 2020-10-16 22:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ac4a06b74de628fa6c3a9a45fd0b8772 SHA-1: bb96421573ab12c1cb8ef55d839bcae4ad90e1d7 SHA-256: be4d00e478194698bc66a58c43ffb4c6e6f6355e0ea2dc55053dec306517f65d
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?keyword=leupold+bx-3+mojave+pro+guide+hd+binoculars In PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/vixesagabonorib.pdfIn PDF document text
    • https://vafuzetok.weebly.com/uploads/1/3/2/7/132740798/tosutuzikowod.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/jilakimagib-nenosi-bofuzinawi-kiwodifizuke.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/3966742.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/1346883.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/razona-dofefa.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/89680c477.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/4265222ee.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/gufegudipejabeko.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000771b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000771b.bin)
    • https://uploads.strikinglycdn.com/files/8967fac5-651e-4797-9645-002239647bfc/34283869664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7074c740-6595-4dc5-b8c5-dd6a3b6a6605/53834924184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ae41d7-533f-4e63-84d4-35a85f18c5e7/28851939185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6bf30ca-6b44-47b5-b3dc-bad8f7bd13bb/jexibubapidisak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b01dfbb3-0cbc-4c0f-ba87-92c5294aee25/lixadulugelirup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa956c1d-0dbb-452e-becb-7a1b3b647b2f/31781686840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebdf456c-bb89-4842-8115-a46a6f1644f9/3401059330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0040/3880/files/paulding_county_superior_court_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7299/5996/files/disney_minecraft_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7628/1031/files/laxirigurakapujat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5349/3655/files/how_to_disable_my_stolen_android_phone.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 extracted file (font_00_sfnt_off0000771b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000771b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771B 5968 bytes
SHA-256: 27ca2c5e4b611a1bd31ac3841d3291e9d579634d31ce46f7ce6cf8dbafe7f28b
font_01_sfnt_off00008b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B59 14596 bytes
SHA-256: ae8d6ce9d376c4ee9df783b15a307f32611293e01508ba47e13baa4794ff488a