Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad93e87bbf3bd6b…

MALICIOUS

PDF

45.3 KB Created: 2020-10-18 22:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 22ce21719f46ff75425ec72772b1295b SHA-1: 75c790772a60cd9bc886743be252f8b915deca9b SHA-256: 7ad93e87bbf3bd6b44595a812148b604500d125ceecea17446d1456a02ca6052
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/123?keyword=free+human+body+worksheets+for+2nd+grade In PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/209ea32a809e8da.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/lezofixogal_papevinedofera.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/buwema.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/2790917.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/2f8ca042a26b.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/6934293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8c856eee348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f88acc78845f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f89ea0f10983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5f8b5eaad165c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f870f140d443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f86f8ee7c544.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/6052223d-7555-4811-8039-ac0a862ed260/felunonisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19420ba2-6813-40b3-83af-0059f8d9c0c2/mawumidivokigipunamegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe10c0d8-9786-4668-8f8d-0ed2d09f1e2c/51501223042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60513967-a1b9-4242-87a4-6b31968d9bba/23644616068.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_off00007034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7034 5772 bytes
SHA-256: 572a64368aae984104580507fdafd09f069d83bc859786d733cf6cc14f644b39
font_01_sfnt_off000083d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D5 10796 bytes
SHA-256: 71b54d3063e48ab5571f94c4cd791d91a683c9e0bf710eb3da8cf7d1391e89d2

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