Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4b89b9eab4c264…

MALICIOUS

PDF

36.3 KB Created: 2020-11-01 09:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 91bedd465a3b7b848290b9ca6b3e89fc SHA-1: 99e0af5194a87c4cd4741fbe2cc047e9a0a0a2b6 SHA-256: 2b4b89b9eab4c264e4a1db2e105614f9f3d691b9b7d93522d0ccfca12951972e
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.me/123?keyword=ipazzport+mini+bluetooth+keyboard+manual In PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/0b76276c9.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/6542720.pdfIn PDF document text
    • https://dutedurelixuvu.weebly.com/uploads/1/3/4/3/134320021/5256538.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/8615421.pdfIn PDF document text
    • https://zatafepe.weebly.com/uploads/1/3/4/0/134000007/jasisokigitewap_takinu_jewexozopuli_watakixesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5f8b76632cadc.pdfIn PDF document text
    • https://subonotewus.weebly.com/uploads/1/3/4/3/134347286/vazotezawomuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5f938c8f8a7a0.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/nimanufezawoxev_leboz_dasapuzivezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f8a2223b2023.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/391582.pdfIn PDF document text
    • https://zipazoraxegav.weebly.com/uploads/1/3/4/3/134325660/8774436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f98f9bb2eec9.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/2a5d147a59386.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3962/8703/files/what_is_a_girl_sheep_called.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_off00005071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5071 5312 bytes
SHA-256: ae92ec56423de6b5e6f21edf537a70eb35c1d161530d087d03f35ea6e1872e77
font_01_sfnt_off0000625b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 9960 bytes
SHA-256: 4905a1dafb7b03e1e5b2e3bb44d7bb0d23929b6088c2767699b884ba635bc5be

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