Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9cedadbde0bbf66…

MALICIOUS

PDF

81.4 KB Created: 2021-09-09 04:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 783e0e56a89dd0e0a77d80724a8e6da2 SHA-1: 84dd556aafe3543893766adb76a155807f2f10a0 SHA-256: e9cedadbde0bbf6626405fc0bf3fc01a9e3ad72bde1a3fcf3d03370f040f1dc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised websites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/45355188604.pdf In PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/widuvutevaja.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/95604672005.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/17030447047.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/zenigumowejadenifezelapus.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/23900414735.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/betuworoxoxujazusalewixed.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/39928252686.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134500ca2e60---95294465664.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/61219202282.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/31237671518.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/97138648185.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613610f760697---60557925080.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/vvadv09dm4r24rc1gompu7l4am/42231790131.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210907182055.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-9-9/20210909022928262208.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/90304999957.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/vinuguwe.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/suxuwoguwezeku.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/46938934992.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5362e199cc46c17889a071af26aaad44/rufivasomozezuzudi.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/25602823923.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/akkl8u9qmm7jqa8aioitdrten5/98507231143.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/kuvixazipagupulefumila.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/bujikobamaforiwibabino.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/20f1dccb9cec92968d11d1eba99305fc/55746537697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=windows+10+32+iso+downloadPDF 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_off0000de4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4C 10456 bytes
SHA-256: adfb7441d1be8f75dc29de2ba7fd3efb0c44e4afa0f9f36419004df0101ffd9a
font_01_sfnt_off0000f641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF641 16132 bytes
SHA-256: 6ba9a0da3ae267f2d28f1bc3770da84d74c9749503e8efa6e24bd73f23a843dc
font_02_sfnt_off00011fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1