Malicious PDF — malware analysis report

Static analysis result for SHA-256 95359b463ed17569…

MALICIOUS

PDF

80.6 KB Created: 2021-03-06 17:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6a9e2c572a8bf510c9e7d6912ebe10fa SHA-1: 027525a5d6ed5d1c731eaa733089529aa075d5ec SHA-256: 95359b463ed175692a129ce13cfb92d621b9e5c49949326bc532052e2374cfdf
166 Risk Score

Malware Insights

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

The PDF file is classified as malicious, with high-severity heuristics indicating it contains suspicious and invisible links to external domains. The document body, though obfuscated, suggests a lure related to economic topics. The primary malicious IOC is the link to 'securityofusersdevicesonline.site', which is likely used to deliver a phishing or malware payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/aws?utm_term=explain+the+impact+of+globalization+on+indian+economy PDF link annotation
    • http://securityofusersdevicesonline.site/67481235399q1rf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_60411b5e98843.pdfIn PDF document text
    • http://potoborotagivud.22web.org/peselakof.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/aS4jfhc/amazon_kindle_paperwhite_case_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/Tdibuig/dogixugikoni.pdfIn PDF document text
    • http://ampinternational.org/69388139620b6br2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_60074fd452765.pdfIn PDF document text
    • http://lefuvaguvupawax.iblogger.org/year_3_reading_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424672/normal_5feb1646565bd.pdfIn PDF document text
    • http://tryne.xyz/income_statement_analysis_reportcytq9.pdfIn PDF document text
    • http://dajumike.iblogger.org/speaking_activities_free_printable_worksheets.pdfIn PDF document text
    • http://pozorigedaxepi.iblogger.org/wubegapufigogaxavasixowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5ff7d94b126f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_df38a27a32cf4b229fa03af2c43ec3c8.pdf?index=trueIn PDF document text
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_a85b9938f84542b4aa41f0ad323c28f7.pdf?index=trueIn PDF document text
    • http://zefefudu.rf.gd/pilizesixinifibekorawire.pdfIn PDF document text
    • http://zizizototumat.rf.gd/sql_server_format_date_yyyymmddhhmmss.pdfIn PDF document text
    • http://roweviwumi.epizy.com/gun_lake_michigan_fishing_guide.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_d0310825fb674568be7d7532c57fee58.pdf?index=trueIn PDF document text
    • http://sifebina.epizy.com/nhs_self_certification_form_scotland.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_off0000fc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3C 5612 bytes
SHA-256: 825413894adc5140c51e06de17826d7d88dab382848721d3df4b9bc2b3202e07
font_01_sfnt_off00010f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 10780 bytes
SHA-256: 2fe0eaecfc3170348ae706c4b962585430c4bd921615e60fce6628822fb79c24

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