Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2766c5da32f0dd…

MALICIOUS

PDF

161.3 KB Created: 2021-05-28 14:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e051b4389cda4b08a2319a0dd6c35aa7 SHA-1: 956f66a840af8ea8e701e0a04f2404a7e6c622d1 SHA-256: 3c2766c5da32f0dd399535b3b9d4d1980981a1f0afb28e3f1abb6f5842ce37cd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains numerous embedded URLs and exhibits characteristics of a link farm, with a high-confidence heuristic flagging it as a brand-impersonation credential phishing lure. The primary malicious URL identified is associated with a redirector leading to another PDF, suggesting a multi-stage phishing attack. The document's content, though obfuscated, includes terms related to uniforms and a redirector URL, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

Heuristics 5

  • 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://numixugag.weebly.com/uploads/1/3/5/3/135324818/ae9015d83c07b35.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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crophysi.ru/strik?utm_term=new+us+coast+guard+uniforms PDF link annotation
    • https://numixugag.weebly.com/uploads/1/3/5/3/135324818/ae9015d83c07b35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459780/normal_600bb7937667c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_5fd30fab2194e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_6054d59eec1d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463532/normal_6066b78e1cdd2.pdfIn PDF document text
    • https://jutemutugitut.weebly.com/uploads/1/3/4/6/134617260/xivel-bavalemaravi.pdfIn PDF document text
    • https://dotowukigirer.weebly.com/uploads/1/3/1/1/131163902/746746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_6012f9f2cd27f.pdfIn PDF document text
    • https://bizuzekibokosu.weebly.com/uploads/1/3/4/4/134446479/midew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416496/normal_5ffc7cf40acd1.pdfIn PDF document text
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/752550d41f4dcf.pdfIn PDF document text
    • https://fosapiluni.weebly.com/uploads/1/3/4/6/134653401/1594d15c9f.pdfIn PDF document text
    • https://mubujibazakob.weebly.com/uploads/1/3/3/9/133986275/284233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_605d7ff508b9f.pdfIn PDF document text
    • https://doliwalesi.weebly.com/uploads/1/3/0/7/130776147/zifexidopag.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/rodosezazikiwo_vamixesosiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_6064bc7060c5e.pdfIn PDF document text
    • https://ranipevuzide.weebly.com/uploads/1/3/4/3/134366839/miziti.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/f291f47d-a573-484a-bf82-70c502a058be/ccnp_route_300_101_dumps_9tut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e07606-035e-4304-9794-4b73d6663b99/maxawelavekojis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4344a17-2051-450d-b306-67e32ff058c8/66424937765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdf6a129-ce65-4ec9-80d3-bcf53d6028dd/gawibeputodusokusaxanuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60581dec-17c3-4f60-9b2b-e46c428c3b57/mogenamavibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec585ea-d4dc-41ed-b0aa-9b1a5d5b9b2b/benekavisawafadebefakil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0150db4-99ea-4b61-8150-17cd9026788f/what_is_the_cost_of_ipratropium-albuterol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1308e16-2176-4be1-aa8e-2c56663fa931/88169730696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58dc7a65-8b4d-40a9-b796-bf4f1ee2feff/funny_books_for_five_year_olds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18b54de2-f7f1-4d2b-a1de-70f820a3d74c/40069460896.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_off00023b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23B67 5368 bytes
SHA-256: 9c734b40b40acea6cd6b8ea94c199817d89d81eedf42fb341451ae0e01951000
font_01_sfnt_off00024db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24DB1 12024 bytes
SHA-256: b696f64fd728f87c00f64d61a6184869c4a4f21f64fabffbc6d45bbfbe783895

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