Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32c0ea73f25bff3…

MALICIOUS

PDF

86.2 KB Created: 2021-09-16 09:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8d9198fdf6f131d2098a1fa29f40c83a SHA-1: 5f697b082e2632c40e4ab3f766677cfe39e57ad6 SHA-256: c32c0ea73f25bff3c4fc207437e5fb2daec2f34da239b18f0c830f125f8cecc9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to other PDF files hosted on potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://olivierdaulte.com/ckfinder/userfiles/files/fekujoja.pdf In PDF document text
    • http://hotstamping.pl/files/file/53255232150.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/54040568151.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/28908509941.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/bonumonen.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/80960750226.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/josujelewagisepik.pdfIn PDF document text
    • http://meuseguro.top/fotosempresa/files/74267835786.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/b536ef3285e93823af34ec689a52e777/joxerubojedekakujofu.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/gadevifeguluzefexefun.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f41d2b4a7c---vegililumu.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/sozum.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d0b823d3c0aeb45bd1adb865f948f8cf/14976914334.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec93538b35---43374347603.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/rixorexumexilax.pdfIn PDF document text
    • http://kaies.cn/upfiles/2109130602226693906ghtij.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/90169501551.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/43671985062.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/29295816024.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/79110224155.pdfIn PDF document text
    • http://proxkimya.com/resimler/files/69233282326.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/12060520631.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/wugasipitezipufi.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/54618314819.pdfIn PDF document text
    • https://avukat.dnsaktif.net/upload/files/fidupurorupu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=yts+app+for+androidPDF link annotation
    • 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_off0000ef44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF44 10296 bytes
SHA-256: a4b0621eeaa50054deffa8c305979350e801aa268f9ec82f06e420489054bc92
font_01_sfnt_off0001068c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068C 17180 bytes
SHA-256: 08d5c84c800ddb940e568d67a9bdf05b2eeb2d26d8b21a2937dcf9c9ba036300
font_02_sfnt_off000132df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.