Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c501516aabb1f11…

MALICIOUS

PDF

34.6 KB Created: 2020-10-05 05:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dd00c9b26a09c0234dfd68584d0059e4 SHA-1: 339efed89b1e79e4653757d5906675e6f02934ab SHA-256: 4c501516aabb1f118e92fe3e2349609dc3f96d8f82aa4ea756f38de5f33cf863
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://ggtraff.ru/strik?keyword=rk+miles+hatfield In PDF document text
    • http://kinumoj.smithdonnelle.com/uploads/1/3/0/7/130740178/9119186.pdfIn PDF document text
    • http://wader.comeseescotland.com/uploads/1/3/0/7/130740385/7cfc30.pdfIn PDF document text
    • http://mawole.harrysinkpot.co.uk/uploads/1/3/1/0/131070750/tunogudovevu.pdfIn PDF document text
    • https://site-1038840.mozfiles.com/files/1038840/fawubute.pdfIn PDF document text
    • https://site-1040136.mozfiles.com/files/1040136/zomanemuvisabalinapu.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/lilowu.pdfIn PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/jevejebiveratenowag.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/fejuzisepadubo.pdfIn PDF document text
    • http://files.cmcpressurewashers.com/uploads/1/3/1/1/131163740/58e1f029f.pdfIn PDF document text
    • http://xowixuso.thedoorsandiego.com/uploads/1/3/1/6/131606968/sijeronogaw_telowifojeso_gazafujetomibaf.pdfIn PDF document text
    • http://latonegax.drthomassmith.com/uploads/1/3/0/7/130775429/89d2b235b8.pdfIn PDF document text
    • http://files.alexbuehler.com/uploads/1/3/2/6/132681910/f11987.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/666021ca-476a-473b-a2e7-74e223796bf8/54008737010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ff1b09-c120-4d2e-a477-7c2edad0ca50/653990925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/400fe791-581f-4cbb-a9c8-531f81c0ab91/wadesen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3337df9e-055f-4e6c-8a0a-31f54db6a552/86733421360.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_off00004aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABA 5124 bytes
SHA-256: a252c1c56a22632ae12dee956958a2935b9700123b8653355a96e4916647efc3
font_01_sfnt_off00005c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C05 9924 bytes
SHA-256: e9ec7ea61d02e7746e7f87f82cbca7c025de84b7eef532fdc72397814aa881f1

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