Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc14329e82c4df8a…

MALICIOUS

PDF

72.8 KB Created: 2021-02-21 11:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5a373a8a6eab3204343cf9c9643b70c6 SHA-1: ae6c6969687b99c75811bcd451cbee2f93b8db6d SHA-256: dc14329e82c4df8a23f9dd0523e96dacade1e059896861c7aee96d81fe54ba07
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

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://druttle.ru/123?utm_term=where+to+donate+good+furniture PDF link annotation
    • http://amsidisi.xyz/breaking_dawn_book_2eeh2i.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/xifetusevijazu_zupomewuvajatu_dugirajakusaro.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/gebeloni8h1e3.pdfIn PDF document text
    • http://gbarb.me/limitations_of_deficit_financing2h3c2.pdfIn PDF document text
    • http://atomyimperial.ru/guess_my_age_puntata_15_settembre_20207uetk.pdfIn PDF document text
    • https://xofivexaroza.weebly.com/uploads/1/3/4/3/134321457/xibususejaxekes.pdfIn PDF document text
    • http://delojenopow.66ghz.com/xolelop.pdfIn PDF document text
    • https://rifewageza.weebly.com/uploads/1/3/5/3/135349229/3048ab99df.pdfIn PDF document text
    • http://afracheat6.xyz/paraiso_travel_libro_gratis1nclb.pdfIn PDF document text
    • https://zejuvuvegodefi.weebly.com/uploads/1/3/1/4/131453892/xukalinox.pdfIn PDF document text
    • http://ketorebagibof.22web.org/conclusion_and_recommendation_of_internship_report.pdfIn PDF document text
    • http://polfact.site/advaita_vedanta_bookstvvlk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/lineare_gleichungen_aufgaben.pdfIn PDF document text
    • http://takoxiwewol.epizy.com/bawipugabosidaluze.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/buxewusudo.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/indian_actress_photo_gallery.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/functional_strategy_and_strategic_choice.pdfIn PDF document text
    • http://bironibubelad.rf.gd/90824758227.pdfIn PDF document text
    • http://fezaxakanopejux.epizy.com/10398609346.pdfIn PDF document text
    • http://buletamapa.rf.gd/whats_the_advantage_of_tidal_power.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_off0000e271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 4972 bytes
SHA-256: f24eeda99f5b255c038863b9fe055302d2f01f530edd67324da180a8f5503bbe
font_01_sfnt_off0000f367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 10160 bytes
SHA-256: c91efe7eaf0fc7bb02fe356bd250f6b3a05240e1a252f9711c52ae706109d9d3

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