Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b9056d8657fb89…

MALICIOUS

PDF

44.7 KB Created: 2020-10-09 12:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 50830b7d73f489c6ac10222de0df6388 SHA-1: ba01fa1a466dc667994b4da3b53a32007298b273 SHA-256: 31b9056d8657fb898a00e4ce58ab2ff8e019f516319a28c3aeac3b435a41682a
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/pify?keyword=vikings+village%253A+party+hard In PDF document text
    • http://files.mrkrieg.com/uploads/1/3/1/6/131636988/vogexazebofuxuxogu.pdfIn PDF document text
    • http://files.helenkaufmann.com/uploads/1/3/0/7/130776734/e7326393ff71959.pdfIn PDF document text
    • http://wonizedak.bellecityvet.com/uploads/1/3/1/4/131405997/gosafopapiru.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/28151617691.pdfIn PDF document text
    • https://site-1042844.mozfiles.com/files/1042844/ritadutepoxaxa.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/gufidifotoguwosimafumad.pdfIn PDF document text
    • https://site-1038538.mozfiles.com/files/1038538/74446386511.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7a5e5f1c-93f0-4793-b5dc-46850515d70b/24813874958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6dcf542-42eb-4ed1-94c0-5626869442c4/77387281384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617bde38-c993-4b23-ad56-d4037243a587/11974315507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6022d3-1eec-4ccf-b382-1f99dab0b2cc/watoragoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385d1a90-de37-4864-8bc3-b98ce19cb29d/94017692788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54963532-900e-43ca-b061-b0c615c14d70/58418393057.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_off000063ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BA 5140 bytes
SHA-256: 4e1539043d88f2822412d5080873ad3f8397286a7cd0c23bfc4d5a9d050a3996
font_01_sfnt_off00007531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7531 10208 bytes
SHA-256: 6600e94989b01d5df8a788c49fa4b0078f7acdbb58768752f07b53d6b1f4c800
font_02_sfnt_off0000981b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x981B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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