Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab33749d595bb1f…

MALICIOUS

PDF

45.6 KB Created: 2020-10-27 02:22:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 502dff09ed88d599f05adf8d0caa6170 SHA-1: dc0b20f4e1e96957048c9a751933625df30e900a SHA-256: 2ab33749d595bb1ff46a46efbb1694cf02bd6ad79309d140ea24422310007016
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a brand impersonation lure for Microsoft, directing users to a malicious redirector. The embedded URLs and the ML classifier strongly indicate a credential phishing attempt. The document body contains obfuscated text and URLs, including the primary malicious redirector, suggesting it's designed to lure users into a phishing site.

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://susetizumuru.weebly.com/uploads/1/3/4/4/134461935/sufamarorodore.pdf.
  • 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.link/123?keyword=top+online+gaming+websites In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f8b56a9a8a92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_5f97608ab47fd.pdfIn PDF document text
    • https://susetizumuru.weebly.com/uploads/1/3/4/4/134461935/sufamarorodore.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/d5a4cb1870df6e6.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/8438547.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/giwolotiwipeguber.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/8538373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f8d29aededd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f946b7b642a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f8a10d118748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f897e4c73a9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/86554756397.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/financial_risk_management_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/insulina_y_metabolismo_de_lipidos.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/biogas_stove_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8504/6974/files/tafitesuzopaboxojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33de446f-806f-49e1-b323-15ddffe560bc/zedirogatizimozuriti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5555aa6f-de29-4b00-aafa-723aa8da2a98/gidagepaguwosavemoxedop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0877f96-e2fe-4db2-a811-d1e3f8bdced0/82323900112.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_off00007441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7441 5224 bytes
SHA-256: 7117f922598b8fc4385306a6a6f8865d92172872423fe124d2cf8480b123975a
font_01_sfnt_off00008609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8609 10320 bytes
SHA-256: b4c3adc4b83e2f1db81fc9595ff06d79dfdb6a64b2d2c9480d8ea8ad30a6fae6

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