Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e2616a195f9dce…

MALICIOUS

PDF

66.5 KB Created: 2020-11-07 20:46:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 83816fd30dcda6deb8266dbccde54e34 SHA-1: bddd42ed2be704f2519dd571c008cabf47a8d4b3 SHA-256: c7e2616a195f9dcea97b5183aa28fb5b4ab389ca1a782f04d6413d3ce8c98554
244 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.
  • 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://suludizivot.weebly.com/uploads/1/3/1/3/131383823/jogunalolirigor.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://traffmen.ru/123?keyword=plazma+burst+2.5+download In PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/jogunalolirigor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f8ba70217c70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f892982e3299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5f973e24e50bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8b0b9281a19.pdfIn PDF document text
    • https://wilixutisew.weebly.com/uploads/1/3/4/0/134095986/3c867da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://botijez.files.wordpress.com/2020/11/cfa_level_3_2020_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/jebobenobadadisubutegewej.pdfIn PDF document text
    • https://jopafez.files.wordpress.com/2020/11/luxenifinuzejomerutif.pdfIn PDF document text
    • https://wumuribar.files.wordpress.com/2020/11/rifudimifezipeberofotesi.pdfIn PDF document text
    • https://wazewezobe.files.wordpress.com/2020/11/derixinuteda.pdfIn PDF document text
    • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
    • https://rivutuki.files.wordpress.com/2020/11/36422713969.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_off0000c041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC041 5544 bytes
SHA-256: a9600e3ed471f7a057661cbc8bd29e428681a81a1efd3f4b0a14596bc30e3fbf
font_01_sfnt_off0000d326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD326 12704 bytes
SHA-256: 1977fed2837a2ecba171812e3bd0de0e3c396b962525d0763feaca6255d7ac48

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