Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91fe19b75dedc55…

MALICIOUS

PDF

78.1 KB Created: 2021-09-18 01:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4db11cb66ee44fd04ac84b5c27bddd9c SHA-1: 9bedff72fa84c247a304a23ed70ad2a84b409c62 SHA-256: e91fe19b75dedc55b79ea7e54df2306f3ec686bba1b2ad5ef8c5ae34321910e8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to various domains, many of which appear to be disposable hosting or compromised CMS upload locations, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URI heuristics and the 'PDF_SEO_DISPOSABLE_LINK_FARM' rule further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://philabc.ru/uplcv?utm_term=dream+league+2018+apk+obb+download PDF link annotation
    • http://pmrs.ps/userfiles/file/1115143218.pdfIn PDF document text
    • https://ms1oke.com/contents/files/govavapofuvavejofumubugu.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/48324015216.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/fevafod.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135ec2a20992---92354672994.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/nevitagoz.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/pibokadagivirutaloni.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/nokadiletide.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/63633329053.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/jubug.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/10079293287.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/13998222633.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/99424539498.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/pegaluwijirixup.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/nopopi.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gimirexiwezov.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161381608e34e2---12973378134.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/59492761613.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///jevofezexipije.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/peah7p1satmq9hkugvn0bl152p/rosiz.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/42043162289.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/genorozotiretafunewugodav.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/78648927606.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/75429259928.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/88657962142.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_off0000caa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA5 17604 bytes
SHA-256: 03c70c1a5237de67f7d803e622294b95445bac7d38a3303f1487d9010f679b79
font_01_sfnt_off0000f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 11296 bytes
SHA-256: 0741f14f011b1f9c2d477a9d3cb11971576a16002bf65bc33e34126648265ab9

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