Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3586675de95e96…

MALICIOUS

PDF

79.0 KB Created: 2021-03-19 21:10:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8a56d510fae23a6c5dc4bd5ce40b4dd4 SHA-1: 368cf436378d3d76c8d375d499aaab3e95aaeabf SHA-256: 6b3586675de95e96de2d062c4170db35e9f48bdcff8c607d7218d5367f61a90f
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically pointing to 'https://soxebez.ru/award?keyword=pmbok+guide+agile+pdf', suggesting a phishing or redirection attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for numerous links, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=pmbok+guide+agile+pdf PDF link annotation
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/bc430637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447465/normal_5fd9f6988aa74.pdfIn PDF document text
    • https://cdn.sqhk.co/vigeroti/ha1wifv/dynamix_energy_services_indeed.pdfIn PDF document text
    • http://ig-copyrightnotice.com/xukorupoxinasusodexeburfztd5.pdfIn PDF document text
    • http://girlita.space/toro_power_clear_210r_pricebxvm6.pdfIn PDF document text
    • https://guxadudupis.weebly.com/uploads/1/3/4/7/134751999/6649580.pdfIn PDF document text
    • https://wepomifid.weebly.com/uploads/1/3/4/6/134676114/81cad889.pdfIn PDF document text
    • https://jesezexesupozor.weebly.com/uploads/1/3/4/6/134623998/mobizewosol.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/ratoji2ne82.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/RCWghgd/38479629062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_603bbc2e573e4.pdfIn PDF document text
    • http://jowakemanek.iblogger.org/words_that_start_with_dwelt.pdfIn PDF document text
    • http://fartook.online/agenda_2020_em_para_imprimir1qnzs.pdfIn PDF document text
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/wadabevuketonebexi.pdfIn PDF document text
    • http://datab.vip/zujovubibovokogerifozotagim0ny.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/fotojipifuzitul/is_a_vpn_worth_it_for_torrenting.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/calcium_oxalate_diet.pdfIn PDF document text
    • http://fugedofa.epizy.com/informacion_sobre_los_bailes_tipicos_de_argentina.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/mizuguvaminepisiratilo.pdfIn PDF document text
    • http://derasowuras.epizy.com/wanobenosed.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/68424462220.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_off0000f5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 5292 bytes
SHA-256: c2c21149a7813374343693e7353e26a0e9081e53d43229e0733b49740fb6cce7
font_01_sfnt_off00010796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 11244 bytes
SHA-256: 58f1e0f698be12f32aa29cd17ee776fd361e2343dc9176c65bdd9a1e9a6c2782

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