Malicious PDF — malware analysis report

Static analysis result for SHA-256 712b2db68e17fdea…

MALICIOUS

PDF

84.0 KB Created: 2021-03-16 17:36:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 59806e43125e8e3818efea628a80905a SHA-1: 018594ecb4998820b77a68d78b93dfd7dba6dffc SHA-256: 712b2db68e17fdea18347810dcd258ac20c72a94183546ec1714c24458d07c62
126 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to 'lozipotod.ru', which is flagged as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'pc grow box guide'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=pc+grow+box+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382003/normal_60494fc791c35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378410/normal_5fc6c767db429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475734/normal_601a346d6ac12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_603088ed976d1.pdfIn PDF document text
    • http://smartcreditus.info/best_platform_games_ios_2018xw4f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_5fcbd2783d8f9.pdfIn PDF document text
    • http://kebilosudo.22web.org/gawipetutaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_6044fe08d3ac5.pdfIn PDF document text
    • http://prosucre.pro/votupk9nuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_5ac18d4282b247fc907c2ae570ea968a.pdf?index=trueIn PDF document text
    • http://zipifuxe.epizy.com/how_to_find_the_missing_exterior_angle_of_a_polygon.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/strategic_management_competitiveness_and_globalization_concepts_and_cases_13th_edition.pdfIn PDF document text
    • http://dopatujijidami.epizy.com/97832024704.pdfIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_0dca737e110e4743b5072741c7f6d51a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/98667795488.pdfIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_ebea34660e7944c98d1769b2243b7df6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/jewagizipaginil.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_off00010dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC6 4988 bytes
SHA-256: 3b1d86868ed0a25dbb03c1f269bcc2b8dcb11f2d2503c2af32dcbd78669c02c0
font_01_sfnt_off00011ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE2 10580 bytes
SHA-256: 770da1d9fa7837c91b6519748f0da0e2032c7fa2feea6224879fd8fb62b62c11

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