Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0295de136829a5…

MALICIOUS

PDF

81.5 KB Created: 2021-03-04 11:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 037ea55776f3c79005194a5d7ae6ef2b SHA-1: 7e0bd43d901b50d0ea103c4edc326e7dcdff0e50 SHA-256: 2e0295de136829a579f39a38810354b712345c4d31a82d4c30bd05c332057b7c
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with the primary one being a lure for a search query. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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://xezojetit.ru/strik?utm_term=what+is+operating+system+and+its+types+pdf PDF link annotation
    • http://vipimuxatomefi.medianewsonline.com/taxaroturito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404964/normal_6004a1dfb3620.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/wojixifa.pdfIn PDF document text
    • https://cdn.sqhk.co/xafigozenusu/UVQbDia/pebime.pdfIn PDF document text
    • http://jolidulikan.scienceontheweb.net/craftsman_315_keypad_user_manual.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/watabibazobu.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/vibopepezinomusonuvere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_6012daa40ca29.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/weber_spirit_e-210_gas_grill_red.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369905/normal_5ffd6be9ccd11.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/10732664892.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/jB2oNhf/zolavik.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/hhenlf7/11582909870.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijiwaras.onlinewebshop.net/66106541105.pdfIn PDF document text
    • http://nudagimanefej.atwebpages.com/vitamix_blender_amazon_uk.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/blueprints_family_medicine_5th_edition.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/rizoxasexijegipu.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_off00010264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10264 5540 bytes
SHA-256: 82c60771d0c4f4438479a83a3732be35406a811470fcb784719940647b772c56
font_01_sfnt_off00011521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11521 10336 bytes
SHA-256: b62644f85ac719c676f95f1238e181ff5233927d5389663194639a67de21fe67

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