Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de0e583ff33cc50…

MALICIOUS

PDF

44.0 KB Created: 2020-07-09 16:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 78a8a5d79d4b00b80b7f121b69533425 SHA-1: 8acae31213e17b4349682174ec381d0f763e76f8 SHA-256: 0de0e583ff33cc50497ebb91bbac0ddd67d45d590d545551bfc953b52586255d
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded content contains numerous URLs pointing to external PDF files, suggesting a tactic to distribute malicious content or manipulate search engine results. The ClamAV detection and ML classifier further confirm its malicious nature, likely acting as a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-9226105-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9226105-0
  • 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.
  • 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.cc/wb?keyword=singer%20facilita%20pro%202968%20manual In PDF document text
    • http://files.well-estar.com/uploads/1/3/1/6/131637034/91a0067.pdfIn PDF document text
    • http://files.snohomishvalleyicerink.com/uploads/1/3/1/3/131379320/pubeva-menizekij-patawotosaxos-zagepegimuxed.pdfIn PDF document text
    • http://files.bangkokfloatcenter.com/uploads/1/3/0/7/130739251/dofusoderefiponadogi.pdfIn PDF document text
    • http://files.renuchaudhary.com/uploads/1/3/0/9/130969992/madoke_govivapezuku.pdfIn PDF document text
    • http://files.manuahealthcare.org/uploads/1/3/1/4/131407281/cffdc39961db4e.pdfIn PDF document text
    • http://files.lakeridgecheer.com/uploads/1/3/0/7/130740087/9ef5e.pdfIn PDF document text
    • http://files.acmechassisfactory.com/uploads/1/3/1/8/131856844/tigejukizogutogeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ginirosidu.files.wordpress.com/2020/06/30276178428.pdfIn PDF document text
    • https://filokexepizi.files.wordpress.com/2020/06/bizurufofezilatufe.pdfIn PDF document text
    • https://fewofeziv.files.wordpress.com/2020/06/54316499027.pdfIn PDF document text
    • https://renapiros.files.wordpress.com/2020/07/bepikuve.pdfIn PDF document text
    • https://zabalojiji.files.wordpress.com/2020/06/sidizese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78491346320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.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_off00006067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 5776 bytes
SHA-256: 886d3003db9293096f30d5db2e82da04f71239af0ca50d889d7abb91e38a5821
font_01_sfnt_off000073e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E6 15992 bytes
SHA-256: f8a6073baec4f4860e2efe009aa3a5c045706fba073f1aec25c9f44b2aa27540

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