Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d869473b07915d4…

MALICIOUS

PDF

44.5 KB Created: 2020-10-16 07:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 86a9cd9c797e6fdbdb042d48d6012570 SHA-1: 32907004b2e32bf22532480c8eb52af180776a40 SHA-256: 4d869473b07915d4e358e6ac4b2f421eb2415078680c69d47ba6cf552a578eba
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://gettraff.ru/123?keyword=our+discovery+island+3+student+book+pdf In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/9a5526b.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/7544631.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/03f6cfe6d5.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/c2fce4cd86ce67e.pdfIn PDF document text
    • https://site-1040610.mozfiles.com/files/1040610/lijiton.pdfIn PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/nurosuvekonemagiso.pdfIn PDF document text
    • https://site-1038313.mozfiles.com/files/1038313/30317376477.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/f57f8424-d02a-470a-af23-849128526bb8/pagaxexokogutonugifapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462674cb-d938-4ba0-951f-d03a3be1cf96/zerogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82abfac5-0c81-46f9-a0d3-4eb68a4553d3/rigar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4cc2974-859b-4662-939d-9c31b79860bb/vijig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc38d6c-e338-42ff-91c0-7de1f4456752/87596228804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c149c3a-29a4-405b-af5d-8f8fbc76c113/92094374203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c771f3c-1a4e-4770-82b7-54299c2d8e8b/gesizoguwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e928eace-8222-432a-a2c6-5b08c4cc751c/3161887373.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57C2 5704 bytes
SHA-256: 3c655f7d1cf2b6a84c7dc16a228f7f9b3421d5a65dd80fa9b03cfc1577833b0e
font_01_sfnt_off00006b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B44 11464 bytes
SHA-256: 95716b4eed4c18b155c0851f0867577503d93716eaca3e1f262165076c5c21e4
font_02_sfnt_off00008f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5C 16144 bytes
SHA-256: c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b

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