Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2f3d43849f2471…

MALICIOUS

PDF

72.8 KB Created: 2021-04-10 07:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b049f6f6bfe63b518d0325cab4cd612f SHA-1: d191decc75f1b2c1e7b971b3eaee02039eec3f1d SHA-256: ba2f3d43849f2471c3424a52fb75c917453966de184aa3592b5c47ef0678dcdf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://botokaw.ru/strik?utm_term=will+you+come+and+follow+me+chords+pdf PDF link annotation
    • http://tugumefuk.iblogger.org/microsoft_excel_2020_practice_exercises.pdfIn PDF document text
    • http://getplafond.xyz/99006384018q2vt0.pdfIn PDF document text
    • http://zhk-samolet-krasnodar.info/xivuwonanisogojibuj9hkyw.pdfIn PDF document text
    • http://getsol.xyz/ronukirawaxukenazazerutimgxc3d.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/6e50aea855.pdfIn PDF document text
    • https://dorixakogika.weebly.com/uploads/1/3/6/0/136051108/faxoziwekepa-wiselagujuk-zoxamore.pdfIn PDF document text
    • http://goproits.com/mosofabevumixibwap47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_7f80c50936aa414bbb3b7b516a0d9268.pdf?index=trueIn PDF document text
    • http://xuvatifovefad.epizy.com/batiwoliniwonupexarar.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_8b54b265b5a944d48dfab00ab8b7be4a.pdf?index=trueIn PDF document text
    • http://kefekebew.rf.gd/kekavojilevis.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/12067234375.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/6346674725.pdfIn PDF document text
    • http://rabibunipidozok.epizy.com/half_size_of_a4_sheet.pdfIn PDF document text
    • https://6090ae5c-070c-4b50-bfd2-11a66789f099.filesusr.com/ugd/83cce3_efcdbd42ef15470ca21395825c565df0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xubifupi/beamer-_like_template_for_ms_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/3174783875.pdfIn PDF document text
    • http://rimiboxumexif.epizy.com/fodakuzinuzepozovulafef.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/70294878301.pdfIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_c1de28e7a9834e5296227d5217c992ff.pdf?index=trueIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_c60b3b7b93f74e2c809fea53c19b2bfb.pdf?index=trueIn 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_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 5604 bytes
SHA-256: c6342a7c26c0c6d877643794a04540045d08e667bf634d159a5da789ff8ddea9
font_01_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 10584 bytes
SHA-256: 2e3c0b0ddaa84d4fa1ace2fc31671d2956d0d7beebf1494adb011d26e777e00d

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