Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5972970cb53fc6…

MALICIOUS

PDF

33.9 KB Created: 2020-10-08 10:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fd6aa6ab1f19396dce8f71b37703fc31 SHA-1: 5cd5b609dbe75ada0f92a135bbae2f1a5c91b078 SHA-256: 1e5972970cb53fc6fbb0334ff3a68ad7d1abfea80edf97dd760c187033c8f1f1
124 Risk Score

Malware Insights

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

The PDF contains a malicious link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text and embedded URLs suggest a social engineering lure related to company registration or hosting attestation. The ML classifier also strongly flagged this PDF as malicious.

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://cctraff.ru/strik?keyword=attestation+d+h%25C3%25A9bergement+pdf+soci%25C3%25A9t%25C3%25A9+g%25C3%25A9n%25C3%25A9rale In PDF document text
    • http://files.jazziebella.com/uploads/1/3/1/6/131606343/lazuresaronukijiraf.pdfIn PDF document text
    • http://files.fhcamd.org/uploads/1/3/1/6/131637034/5932877.pdfIn PDF document text
    • http://files.directadhesives.com/uploads/1/3/0/7/130775870/2439904.pdfIn PDF document text
    • http://files.hicsa.org/uploads/1/3/1/0/131071072/xogutefu-nesovevevini-kadelize-wijopoj.pdfIn PDF document text
    • http://bomez.sw-eliteperformancecoaching.com/uploads/1/3/0/7/130776458/486d44be3b6fee.pdfIn PDF document text
    • http://files.deeperwaterscounseling.org/uploads/1/3/1/8/131871864/fugojuwu.pdfIn PDF document text
    • http://files.rejectrobotics.com/uploads/1/3/1/3/131398334/megezudemoledaja.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/857ee425-76b9-46cb-9b98-2f8e3c61d7eb/67163452483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/036a2677-51b6-4730-9791-e6d8270ae6f8/wudezubakefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd98a9bc-802d-4b34-b8ed-099769b9b6aa/32231558310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb8265f-1540-4b81-b9e9-b8740a5e18b4/baxetimalasanuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1758/2230/files/ralalivorepenifulufezuba.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_off00004477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4477 5840 bytes
SHA-256: 83aa1b212778f609f1c73868869744d3021496e5e5a54fc0013e2e392a697c9a
font_01_sfnt_off000057ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57EE 10044 bytes
SHA-256: 1b9f6d5ac8af38903c44f3452490cf4910cc6dcab0e4ba33a8e4f43a4c949225

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