Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5e9956f4ea6110…

MALICIOUS

PDF

70.1 KB Created: 2020-12-14 21:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 20547076300dc4052e8b5472beabfd0b SHA-1: bbb30d3b57b230c3b2705111e9e994a69a681d17 SHA-256: 9a5e9956f4ea61109c13ca4e00c8e7c5f542eb5de64d2ec9f1dfbb56f8e028c4
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links, with critical heuristics indicating it redirects to known malicious infrastructure and functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ggtraff.ru/123?utm_term=bible+myths+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4490141/normal_5fc3cff14c259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_5faff18239dd4.pdfIn PDF document text
    • https://mipijipibax.weebly.com/uploads/1/3/4/8/134873473/896a23544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499629/normal_5fb83d1b8d352.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488139/normal_5fcfeb6e5bd0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427093/normal_5fc2c186dab5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5fa319ed6bf9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_5fbb94b858492.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc57a2a1452f90b7f03fee5/t/5fcd434574a40730fba6126e/1607287622865/95846282592.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd14fab24ece27e9136f2f/1606227194208/google_docs_frozen_2_english.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe301fa97599144ec1fbbf/1606299680776/nervous_conditions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc306b292c50b1a1e856a3b/t/5fcf972d68c18617d417ec09/1607440176302/golib.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_off0000d4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B6 5264 bytes
SHA-256: 4bed380585358b90d4c9e3b4c5d4167302733317cfde56d363e4e97f87c4f14e
font_01_sfnt_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 10940 bytes
SHA-256: a6c3742d81c395daca77e695d82db75a2b30f5b569ab6c25d0b2531dc7085cd3

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