Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fea12dbd44f45d…

MALICIOUS

PDF

80.0 KB Created: 2021-03-28 06:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 77fdaa16b64cd0820433fd71275c997a SHA-1: 8fc23d5e76ac8e99e5ae8e0d6214afc477c731f4 SHA-256: b6fea12dbd44f45d1b5c8564c538591b833c885bcdfcabce918df853e824d853
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs, such as 'https://soxebez.ru/award?keyword=meio+ambiente+pdf', likely lead to malicious sites.

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=meio+ambiente+pdf PDF link annotation
    • http://sokobumoxagug.scienceontheweb.net/sindrome_sobrecrecimiento_bacteriano.pdfIn PDF document text
    • http://blablablacar.online/aviation_weather_forecast_app46wdu.pdfIn PDF document text
    • http://jalukevevisewe.iblogger.org/44911173097.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/tupulijinemotapanezurex.pdfIn PDF document text
    • http://ranking-se.com/687505985738podz.pdfIn PDF document text
    • http://gujadaxopujidot.iblogger.org/30590260040.pdfIn PDF document text
    • http://mijudivoxobo.iblogger.org/sorupusokebopololubo.pdfIn PDF document text
    • http://xapiduxirob.mywebcommunity.org/can_you_calibrate_an_infrared_thermometer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_58f0184c1c1c46818966e2c649d53e6e.pdf?index=trueIn PDF document text
    • http://puganuditefi.rf.gd/cantos_para_levantar_al_nio_dios.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/kewijeliridafoliduv.pdfIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_97802618bd634277ac7fe69a70162395.pdf?index=trueIn PDF document text
    • http://tozavepanize.rf.gd/rawidaginidopojuxuvi.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_22a2b86a3631432bb7614b5670717af5.pdf?index=trueIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_66a3fb73965b4f8aaf4f1b0c037ab2c9.pdf?index=trueIn PDF document text
    • http://rabopakuzu.epizy.com/2007_dodge_caliber_hazard_lights_not_working.pdfIn PDF document text
    • http://moxosutemow.onlinewebshop.net/vipigorevukizo.pdfIn PDF document text
    • http://sasilefup.rf.gd/vuwezonokokapel.pdfIn PDF document text
    • http://lonukidoni.epizy.com/99550812328.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_b9fd001d5dc642bf9d5b98089bbfff1a.pdf?index=trueIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_47cf322a5b5346548441860ecea708d0.pdf?index=trueIn PDF document text
    • http://jitelujojutomu.rf.gd/xiposidebo.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_off0000f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 5028 bytes
SHA-256: a8cf12ac37ed4ac636d4e68b358cc024571c1b759d527857a71421a9b5738ddb
font_01_sfnt_off000109b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B6 13352 bytes
SHA-256: 10dd706d2cd04f29aa4148c13eb40da6f07642efd524bf976dbf2299681bf56c

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