Malicious PDF — malware analysis report

Static analysis result for SHA-256 20635f2452705faa…

MALICIOUS

PDF

77.6 KB Created: 2021-02-16 23:11:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5a8de078a404c3eec8f9e11f1aab9d04 SHA-1: d7cee32da341b276377be4f2de0eb0f6a15c1a4a SHA-256: 20635f2452705faa8ea6092b01a5fb2f1f4b22bd46e3777eb2fc5ffc5cb00940
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'Gerald's game full movie online free 123movies', suggesting a lure to a phishing or malware distribution site. The presence of numerous external URIs, including one pointing to 'maypoin.ru', further supports this attack pattern. No scripts were extracted, but the PDF structure and heuristics 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://maypoin.ru/strik?utm_term=gerald%2527s+game+full+movie+online+free+123movies PDF link annotation
    • https://cdn.sqhk.co/kavesake/d8jcieL/3024415606.pdfIn PDF document text
    • http://wirelessinfo.ru/tell_me_about_yourself_interview_answers_quoraleqvi.pdfIn PDF document text
    • http://sandwichhq.club/lotuzibvrqk.pdfIn PDF document text
    • http://autolombardpro.ru/platform_revolution_free_downloat7z22.pdfIn PDF document text
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/8357664.pdfIn PDF document text
    • http://teagreen.space/pawebimunopeb0wex1.pdfIn PDF document text
    • http://buloshnaya.site/wevafudazarijamitodipsv0yn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sivopob.epizy.com/45938601531.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/jira_api_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/ordinal_numbers_for_kindergarten_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/80145680624.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_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 5700 bytes
SHA-256: 4d2f57c3e9a715129dfbe0561a0bd9010e6cc20734a4657a6c399484cb5ab040
font_01_sfnt_off00010502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10502 10852 bytes
SHA-256: 73bde72f0b9bf11fee588d8b793dc0d2eeda1caeb12d4a81db2bd6b18b6dfb82

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