Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2430c158d53814…

MALICIOUS

PDF

78.9 KB Created: 2021-04-14 15:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2ffcaaae834098d8e12a8daeb5b0a7fd SHA-1: 613151e17896416e17b21b6ec78186e4605ef868 SHA-256: ab2430c158d53814fc0e071300915c39520eedca5da47d32025bcd46be7baf46
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM' pointing to a suspicious domain 'gimoguvi.ru'. This suggests the document is designed to redirect users to potentially malicious websites. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=is+american+stock+market+open+today PDF link annotation
    • https://cdn.sqhk.co/toriwogadej/b9Grhjt/2015_acr_treatment_guidelines_for_rheumatoid_arthritis.pdfIn PDF document text
    • http://dronextactical.xyz/fl_studio_12_producer_edition_mac1vph5.pdfIn PDF document text
    • https://cdn.sqhk.co/kokojisip/Jjajeih/derailed_commodity_flooring_furniture_independence_ks.pdfIn PDF document text
    • http://reduslim-italy.site/what_is_the_average_density_of_the_earths_core_compared_to_waternf1a9.pdfIn PDF document text
    • http://keksik24.ru/bupulabubovanavekenrosm2.pdfIn PDF document text
    • https://cdn.sqhk.co/mojafefegamo/Zjaif57/97353707524.pdfIn PDF document text
    • http://kungfumalibu.com/12249928105119zf.pdfIn PDF document text
    • http://zesamoa.online/garmin_gpsmap_62s_loading_maps_freewfji3.pdfIn PDF document text
    • https://cdn.sqhk.co/numisezopo/9Byggr1/opportunity_reports_in_sap.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/jgpUgAC/xiruvafebotigekon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wobuzisibal/86715662094.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/intel_nuc7i5bnh_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34c66f8-044b-41c2-9f47-b1a40cbf82a0/binomial_theorem_examples.pdfIn PDF document text
    • https://fa807b06-93cb-4874-af62-f373b1359e5a.filesusr.com/ugd/2d797c_699db85d2dd9423ca8ad82b78061fc96.pdf?index=trueIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_cdf347b66cce499fa05fef712362f054.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/jijuvatobawoni.pdfIn PDF document text
    • https://17500468-634e-4f48-81ad-48a4a068d6fa.filesusr.com/ugd/dcac76_50b03881ad53462da2ec7cd890c706c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fixararololu/remington_700_sps_tactical_detachable_magazine.pdfIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_7182111ed2374de4a9c308de0bc8cb6e.pdf?index=trueIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_dedec51821514b27b09defb8352d46a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/829e2e5f-0727-41b2-93ca-06a86af3b206/audiobooks_espritas_grtis.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/nozebomivomekek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5ED 5076 bytes
SHA-256: 914cbf85fdf135daa41a9c3d7feb6cf274f5a9e1ba0a83977fc6fa8d850af247
font_01_sfnt_off0000f711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF711 11548 bytes
SHA-256: 8c0ebcc71825c5c85370b69f3639ea7aba4257b5cdc7be5b16a82f2527048c07
font_02_sfnt_off00011dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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