Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e63b5a0bc60256…

MALICIOUS

PDF

46.0 KB Created: 2020-10-09 07:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 52d658dc4bea70cced09f44171362248 SHA-1: f65fa14e8e4ab2e1e92787b990d56b1ebdf4c031 SHA-256: b9e63b5a0bc60256a3a4cd1df892e81026c38aa9dbf7e61c34bf9c61bc8f9168
184 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.
  • 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.
  • 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/strik?keyword=elementary+probability+theory+with+stochastic+processes+pdf In PDF document text
    • https://site-1048176.mozfiles.com/files/1048176/besexezupirelewuluwimome.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/ratikanezemu.pdfIn PDF document text
    • https://site-1040006.mozfiles.com/files/1040006/telutavekiwura.pdfIn PDF document text
    • https://site-1039428.mozfiles.com/files/1039428/mubimideginavagumiw.pdfIn PDF document text
    • https://site-1039787.mozfiles.com/files/1039787/petibolaziluripu.pdfIn PDF document text
    • http://files.lacucharamarket.com/uploads/1/3/1/4/131438641/3150093e8e9ed.pdfIn PDF document text
    • http://lufatu.mcdonnellhomepreschool.com/uploads/1/3/1/4/131406681/8822773.pdfIn PDF document text
    • http://sanojike.kamiperiman.com/uploads/1/3/1/4/131408017/xemajitejetura.pdfIn PDF document text
    • http://files.doublesranchbordercollies.com/uploads/1/3/2/3/132302989/964303.pdfIn PDF document text
    • http://lidiroga.samanthasprings.com/uploads/1/3/1/6/131606575/fd5cb.pdfIn PDF document text
    • https://site-1039778.mozfiles.com/files/1039778/55032702269.pdfIn PDF document text
    • https://site-1043608.mozfiles.com/files/1043608/62474039366.pdfIn PDF document text
    • https://site-1042547.mozfiles.com/files/1042547/mutoxijirudow.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/fimaliwuxufenukega.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/cabee00b-09f1-4c43-b3f8-115e452fd288/98638800056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca00fece-81c9-4d6f-8e9c-61da232945ac/wutezijuvulurisosonep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d2badf-4bb7-478f-a244-51d41c747a8b/82532848803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73150bda-bcdd-4485-8ba1-642a07f9213f/76164852716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5617ef-bd46-45ff-91d1-60206b18e615/13572163671.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 3848 bytes
SHA-256: ecda20457ecf3f1669784c1307e54e85f065d70d18f0d08a89da7914e956352c
font_01_sfnt_off0000744e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 5684 bytes
SHA-256: e51cd72079e1da71715c970ce946667ab4c92d830f46a9eb9de71885cfdd1edf
font_02_sfnt_off0000878b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878B 9976 bytes
SHA-256: a02e3922c0ca454121386d20fdb0fa8177bbf80ce2c13d8c94c4d1a7832fcb69

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