Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64e50130b15730d…

MALICIOUS

PDF

69.3 KB Created: 2021-09-17 08:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a7a3d43402e132c0ed4d37c9c061c24d SHA-1: df0e54e1f69aab1febb250010e877cce625a2027 SHA-256: d64e50130b15730da7846f10e79ec728277e39eef898418b1f59c754ed2b0b93
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of external URI heuristics and link farm indicators points towards a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://paneldeconsos.com/userfiles/file/xafujafadaravazazebe.pdf In PDF document text
    • http://mindentudor.hu/userfiles/file/titunox.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/87978914053.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/zuxixusotaderumexevime.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/93020132840.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/texizupebus.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/jorodefutokowip.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/sumewag.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109012203503080.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/24258185696.pdfIn PDF document text
    • http://aromata.ru/upload/files/74444103895.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/zomaxewivutuzit.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/tefibenid.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/livilojamujigi.pdfIn PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/58900488772.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/zazibif.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/xazuxigaxujabefofokotav.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613857f9d0c26---riwexeludupudexuxumu.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135211d17991---jaxuvej.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359a209ad49---tinoraxokebaw.pdfIn PDF document text
    • http://leguido.net/files/24083837629.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/dojezejotanoruva.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/65570113946.pdfIn PDF document text
    • https://sua.vn/uploads/userfiles/file/tibewosemo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pes+19+apk+download+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_off0000b2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BA 10792 bytes
SHA-256: 94cc01d15653b86a1f61b5a3356ab7983dededb037ac01521a387861063995b6
font_01_sfnt_off0000cbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD2 14260 bytes
SHA-256: 1d7dc4eaf22ee7c3c41ee13ff8c620ea8a9b3bccfe2a8dfa7a8ee084afa15763
font_02_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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