Malicious PDF — malware analysis report

Static analysis result for SHA-256 90790bbd122c32f2…

MALICIOUS

PDF

78.8 KB Created: 2021-09-03 16:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 054b4aa205ecb0ee849a0bf13a291598 SHA-1: 2ac218145cf73caa8853ac623d2593dff43aac72 SHA-256: 90790bbd122c32f2450513532198f7df36572c3beb4e631b92065240b1c1fa55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The presence of these links suggests the PDF is intended to lead users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://electroagro.es/pub/files/94546395507.pdf In PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/b8a2fe7f18346f704678f193ca7e2a35/ratojupofag.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/26731246373.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a58a65b0b8b---32841407727.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/pifejukololuxari.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/94166969989.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/19015690517.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/95198fde3cff26205f6d790a6f305fc9/48001591490.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/74953736005.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/razolududekupagider.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/rusasamosirizabororu.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775e7a33189---lomaxidupojizipegedoxud.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/bao77h0418qip39lop507urju7/55179654300.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac24d7d895f---80294494853.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-08-15/3fd47995e99f5841da952c0cce106339.pdfIn PDF document text
    • https://ak-oroslavje.hr/files/90524431027.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/64349220595.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/44dc8068db1fa83feb345a7fd44b43da/lobatunux.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f48f8d2861---gojanalebolevilukoduvi.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/94199733601.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/59478286379.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=civil+engineering+seminar+reports+pdfPDF 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_off0000d24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24C 16336 bytes
SHA-256: d176c78f24c7a80c8f23279bc79bac333ffa320e05ff59359585b6a672dbb9db
font_01_sfnt_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 10940 bytes
SHA-256: 98f407ec2b087c7c22f549eaa490f9b67bd0bf71cb41e75154f860c722a6dc35
font_02_sfnt_off00011586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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