Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5592264dd0aced…

MALICIOUS

PDF

69.8 KB Created: 2021-02-09 19:35:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 182ca33a610baceb2340eebe6a92da88 SHA-1: 61173d2f02e7f6fea387722bc3a1678cebcfdf68 SHA-256: 4a5592264dd0acedf7cc0d9e2a052f1ec2823b68d60ee57137e4a492811a9930
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with several pointing to disposable domains and one specifically using a search term related to 'Vedas with meaning in hindi pdf' to lure victims. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=vedas+with+meaning+in+hindi+pdf PDF link annotation
    • http://natlab.ru/33246997293om2l9.pdfIn PDF document text
    • http://businessmentality.com/560768447347nceb.pdfIn PDF document text
    • https://kikuwigew.weebly.com/uploads/1/3/1/4/131407235/9635500.pdfIn PDF document text
    • http://italystore.pro/7194465803426y3p.pdfIn PDF document text
    • http://filemarker.store/fraes_algbricas_exercicios_resolvidos_8_ano_doca0ycl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodagoge.epizy.com/sample_progress_report_comments_for_esl_students.pdfIn PDF document text
    • http://meseraberutipi.epizy.com/59238456152.pdfIn PDF document text
    • http://donafilozevore.rf.gd/mijazapeparitik.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/adobe_audition_1._5_keygen.pdfIn PDF document text
    • http://kukadafimi.rf.gd/23292856545.pdfIn PDF document text
    • http://pokatutabojew.rf.gd/99014919376.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_off0000d283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD283 5384 bytes
SHA-256: bb3fcf13d1e7f20a19a590688474e397e62598d5bdf56e7b2db731c7f129641c
font_01_sfnt_off0000e4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CC 10476 bytes
SHA-256: 378fbc4709abec28b7e68176d00f9f927fae34e07c49506c9ca174a728b8bdc1

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