Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da8ff9e65c3ecee…

MALICIOUS

PDF

72.9 KB Created: 2021-02-14 22:26:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 6188d8d260fb92ea01fe0e9a5b376f6e SHA-1: b46c1d3210bafcaced5f49ed6e7fe7f5c54732ca SHA-256: 6da8ff9e65c3ecee55dcc344de17b462b81e8eeb1b8b5cc20f3d2f2b0ab10965
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'registration' and 'winter 2020', aligning with a lure for a fake event.

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://jacksth.ru/wix?keyword=pcc+winter+2020+registration PDF link annotation
    • http://megantv.site/craft_cms_search_form7r0kt.pdfIn PDF document text
    • http://tohld.in/66886935977sw8oa.pdfIn PDF document text
    • http://laxeded.iblogger.org/24264371247.pdfIn PDF document text
    • http://pokypka.xyz/pigakewunolovozixeruda1wy0a.pdfIn PDF document text
    • http://freshmind.net/2004e14y2.pdfIn PDF document text
    • http://vemusopudin.22web.org/saint_benedict_prayer.pdfIn PDF document text
    • http://damvglaz0.xyz/pamitigojalepovonuduvuma1p7lt.pdfIn PDF document text
    • http://natorg.fun/citroen_c3_picasso_workshop_manualwxltf.pdfIn PDF document text
    • http://gnfcns.info/jufelanomuj8hck6.pdfIn PDF document text
    • http://yandex-dostav.ru/occurrence_book_formatgkvi6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mopufeva.epizy.com/goredimukevexu.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bible_study_planner.pdfIn PDF document text
    • http://finubovuputok.epizy.com/60685505372.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/manuale_casio_fx-_570ms.pdfIn PDF document text
    • http://pazovegisot.epizy.com/rinadajil.pdfIn PDF document text
    • http://kuzipewas.rf.gd/let_her_go_piano_sheet_music_musescore.pdfIn PDF document text
    • http://fukogalijikufoz.epizy.com/xozeguw.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/35071388961.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_off0000dfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB0 5304 bytes
SHA-256: 69ccfbefc04c289cda774a37cafb4e427c0645be60dad767fd70cdbcc2fe4216
font_01_sfnt_off0000f1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 10308 bytes
SHA-256: 686d11d3d5e08ad6b0b6a827c3b3db3d175104e26205bd773e8b2478259f0078

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