Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d636e876702483…

MALICIOUS

PDF

59.7 KB Created: 2021-05-11 10:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f907296b93c2742aff2cb4b337851fe0 SHA-1: 01b9f67140ee90bee1d95351112ebc1e25a7d682 SHA-256: 50d636e876702483e595c058b318404432c02b88f0c8400a8134616db27a8750
232 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to redirector infrastructure or are part of a link farm designed to manipulate search engine results. The primary malicious link identified is https://yafferge.ru/strik?utm_term=what+does+health+and+safety+training+mean, which is likely used to redirect users to a phishing or malware distribution site. The presence of PRC/3D content and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7633

Heuristics 5

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/strik?utm_term=what+does+health+and+safety+training+mean In PDF document text
    • https://cdn.sqhk.co/jutigurotow/rhdgcif/dakusixewabowegadarufove.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/bmhdvsc/9616823742.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/gdiblja/bafirokip.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/kujevewar.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/N8yijbN/49686558908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_a39fb9a66a4e4f8eb3285a3b0b5dabfa.pdf?index=trueIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_23d5940ff6f54fa9bd287557c345ddad.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_a5bb263d867e43aa8f4bd9151413d43f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/soribo.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/kenmore_elite_front_load_dryer_thermal_fuse_location.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/declaration_format_for_mba_project_report.pdfIn PDF document text
    • http://gidubabe.myartsonline.com/wolax.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/ravatofisoxopiti.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/6251378362.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/73528062504.pdfIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_333f5ee59520482988a5c553d238b3a9.pdf?index=trueIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_abb3c8e13727474bb4d2cebfe2b71e48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusuberu/gananazufaminet.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/lir_laboratory_investigation_report.pdfIn PDF document text
    • http://bitines.myartsonline.com/gulolubowikaluvusatox.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_72ede2469eb34cd68fbf632d5dd710d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/6669176693.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD872 5436 bytes
SHA-256: 89c843a9eb150fb9bddc235c7aacd8ccbf6e224d307a787b3b0b90cf0d5b23ca

Open this report in the interactive analyzer, or submit your own file for analysis.