Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9447229ccf0272…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 20:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6e6415610830374b24f57a0e1a7ab4e6 SHA-1: eeeb7afbd4a7064a61414bc971e452aab10a402a SHA-256: ed9447229ccf0272bf577dac0a65ef67639a41e37ce51f206cc8ee36a342f952
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The primary lure seems to be related to downloading a 'cognitive behavioral therapy for dummies pdf'. No scripts were extracted, but the presence of multiple suspicious URLs and the high ML confidence suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/wix?keyword=cognitive+behavioral+therapy+for+dummies+pdf+download PDF link annotation
    • http://hugertely.xyz/yamaha_djx_2_manualcfdb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421788/normal_6003194da9b8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427274/normal_5fe59a508087f.pdfIn PDF document text
    • http://site-shop.xyz/time_travelers_wife_movie_quoteskln5o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_5fe61339279fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_602aea1211a68.pdfIn PDF document text
    • http://euromarket.pro/darupc6gf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_603d1e962f38e.pdfIn PDF document text
    • http://emmetrix.net/company_core_data_sheet_ccds_templatekyqxm.pdfIn PDF document text
    • http://vivujivavo.iblogger.org/51561831575.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://677f84e8-2a3b-482a-8721-58d714100356.filesusr.com/ugd/086aec_606e79f16fd841c29f444b681d5618be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxunaf/60928307526.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_54bc368430c34c3e96ec0bf10bb23386.pdf?index=trueIn PDF document text
    • http://voxinuxo.epizy.com/business_analytics_graduate_programs_texas.pdfIn PDF document text
    • http://voxinuxo.epizy.com/dansploit_v5._5.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/silk_bed_sheets_online.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/50387315977.pdfIn PDF document text
    • http://tijetefewojo.epizy.com/angle_grinder_uses.pdfIn PDF document text
    • http://sokevojufepizi.rf.gd/bipuvesufiduxudokivixugep.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/types_of_chemical_bonds_worksheet_answers_cacl2.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/fractional_distillation_column.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_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 5752 bytes
SHA-256: fadf0329fe2f907134ec5956e9b9d994c342193cb4d92013abb2cdc20e46d906
font_01_sfnt_off000104c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 11316 bytes
SHA-256: ea0cd4d2c6e65f9bb98e453539420f389f32338cbd7f9d2261e6fd0f8c4c322f

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