Malicious PDF — malware analysis report

Static analysis result for SHA-256 2069b6a3905edf20…

MALICIOUS

PDF

72.9 KB Created: 2021-02-28 21:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8f1299a8e4701a9b78f7e7311521a195 SHA-1: 118be0715109d01848257dc555b63f420ab102fa SHA-256: 2069b6a3905edf201872fa83708eff3bfb992f796162405389836949729ba1e4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URIs, including one pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs and the nature of the heuristics strongly suggest this document is designed to exploit users by directing them to phishing or malware-hosting websites.

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
  • 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://jottigo.ru/award?keyword=which+12+basic+functions+are+odd PDF link annotation
    • http://help-lnstagram-verifycopyrgiht.com/rigosuleduvuzijebuzuju7plo7.pdfIn PDF document text
    • https://foserexekoxa.weebly.com/uploads/1/3/0/7/130740627/6590889.pdfIn PDF document text
    • http://momentikshop.space/famille_d_accueil_chien_guiderl08z.pdfIn PDF document text
    • http://true-board1.club/324601466911xony.pdfIn PDF document text
    • http://avbox.org/soundcloud_cracked_apk_iosveo2l.pdfIn PDF document text
    • https://ruxakadun.weebly.com/uploads/1/3/0/7/130739963/5850899.pdfIn PDF document text
    • http://dream-stat.ru/wopesozalikobol6ir1.pdfIn PDF document text
    • http://kyponnik.online/741600635928qgyk.pdfIn PDF document text
    • https://worojuwoxalo.weebly.com/uploads/1/3/0/8/130814432/4f4b0e5ff00.pdfIn PDF document text
    • http://itfamily.info/59096264661okklb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satudifin/collision_theory_questions_worksheet.pdfIn PDF document text
    • http://mudivufovibu.epizy.com/kirov_reporting_red_alert_2.pdfIn PDF document text
    • http://xokifenutotumu.epizy.com/java_api_documentation.pdfIn PDF document text
    • http://gamutazuzores.epizy.com/ukmec_guidelines_depo_provera.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_off0000e0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D3 5416 bytes
SHA-256: 030c13868535b843656ae83aa20b291237d17ea80eefcc4ab9ffe57117e2f902
font_01_sfnt_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 10420 bytes
SHA-256: 89465ae1d3d19e9dfd5599364a42a0eab86a4268e400c22a258deaec4d711030

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