Malicious PDF — malware analysis report

Static analysis result for SHA-256 70632b22ec29358d…

MALICIOUS

PDF

73.1 KB Created: 2021-09-23 05:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: df08e521b0dfd3eb968d2f79fda85b81 SHA-1: 9490eb59429de1bbd4e794f90a85073f41ce352c SHA-256: 70632b22ec29358dae33af1e4f8bd3c6ec71424ec315bbba1923fc9b84733523
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=download+apps+from+pc+to+android PDF link annotation
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/j5p1qodsn9p1n1bdl58esspul6/sugefegalanaxidewebitum.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210910_980E0C346DCC5432.pdfIn PDF document text
    • http://berbun.com/user_img/file/pafowinut.pdfIn PDF document text
    • http://nhatnguyen.vn/media/ftp/file/sawilope.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/pejine.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1612f40c7cf64b---garumidadogarofekub.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/be5i5veqg1m1fnelpup79tvr22/rowizuxo.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/5578114563.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/13138480382.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/duzoroxu.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/49016080210.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/joziwetagofujanelevugisu.pdfIn PDF document text
    • https://bnovum.hu/downloads/nuvufigatokunerabixef.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/nupimufaxunof.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210917150201.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/69663311748.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/42003471742.pdfIn PDF document text
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/femigoviduze.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/83722999414.pdfIn PDF document text
    • https://xulynuocphangiathinh.vn/images/pic/file/liwim.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/resepudan.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/46690719451.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/6689652878.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/dabafavimimibuderebo.pdfIn PDF document text
    • http://chenruichem.com/upload/files/fixodibitivo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE5 16412 bytes
SHA-256: e9a211b7b0e06b8f2a820fdfdf821d3171b6c83b0c8035912a7761946a7e3d1a
font_01_sfnt_off0000e5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 10736 bytes
SHA-256: 9dab8e1562847f5b42a8bcd5f14363ad38a3faad3dac39c73b485ce885d6382b

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