Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef0f045cb27e5f5…

MALICIOUS

PDF

53.1 KB Created: 2020-10-29 18:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e95c8dc32ed7306ce131738453135d74 SHA-1: de41d1d2df7716d2530705471bb3982759402186 SHA-256: 1ef0f045cb27e5f5a39c221c1391223a057b05b8c5872c5a578694ff88c57947
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links and text that mimic a school website, likely to trick users into clicking a malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that a primary URL leads to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://ttraff.com/123?keyword=sussex+tech+high+school+website In PDF document text
    • https://zavegaligap.weebly.com/uploads/1/3/4/4/134499553/turejusedosimivubo.pdfIn PDF document text
    • https://robivitoj.weebly.com/uploads/1/3/4/3/134334713/f31d8a68209464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_5f8dec5eb080b.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/fa2a4524c.pdfIn PDF document text
    • https://pefekebemapufug.weebly.com/uploads/1/3/4/3/134370705/b1b9a8c148a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8705c8cd05a.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.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/be70d3c2-6714-4944-8f53-aef0a906ce83/zezidajiwoxanemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2fe358-ae8d-480e-9e49-6f30b18c1fe7/pezesub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d11f080-3252-4cad-9775-6d93b57ec1ec/chapter_6_meiosis_and_mendel_vocabulary_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/the_chocolate_touch_download.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/leonard_cohen_biography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc88d35-ed45-49d2-99f3-a9c2f3c6de96/relaciones_volumetricas_y_gravimetri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f319ebbe-8b28-4959-a377-9ff09b2e7f2d/pozigarajekosupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c32995c-55d2-4629-9738-12740724e075/83427081734.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D4 5160 bytes
SHA-256: 22dcc2e5b5a5eb6287d7ed1dcff0b3950dd7b7c596eb8e04d8cd155d4b149605
font_01_sfnt_off0000a27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA27F 10952 bytes
SHA-256: 94ae9490c5b09bcde777832ec00337f42bac5391f40e422237368551d904723b

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