Malicious PDF — malware analysis report

Static analysis result for SHA-256 7526a47f2d9d45ca…

MALICIOUS

PDF

85.2 KB Created: 2021-08-26 06:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e4a32dd3125189feb77b674b649d583e SHA-1: 64ef698a0681283bf6e417f4f4724dfaba9b2eec SHA-256: 7526a47f2d9d45ca53f9b633dfb9ba7dfbe8a291d662f4578d518d10ef05e5cb
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The file contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm intended to redirect users to malicious sites. The presence of these links and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c686e68fd---65083404996.pdf In PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/om5sqo2ckbp6pddfdsudffp7g7/jumujilaxekinivejedev.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/nexupunu.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/212017464737.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6812af9fb---xinijaragixipedovumu.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/josibevibutopupikixujavux.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/42519168093.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ed2acf71047504e372461de14dbd0e2c/nemijomow.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/15280882148.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/vodegamogetiva.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/dejufuziwemowesiwoxukix.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/49709781568.pdfIn PDF document text
    • https://moolans.com/uploads/files/34852621908.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/25987122958.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/55617502580.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611c2c479ea16---guzotigapajesegipomizavo.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/manovodoromobalajazoka.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0534e167daecf01737daaa376687f9de/fosovisemuzuxi.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/16195039990.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/neliwinepuporexeve.pdfIn PDF document text
    • http://ooexperience.be/assets/Image//files/bofutezi.pdfIn PDF document text
    • http://schokozentrale.de/idata/62661269864.pdfIn PDF document text
    • http://fruitvita.com/files/files/lesijijatosogumananavu.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b767c2850---75347919555.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/dufezigovafiw.pdfIn PDF document text
    • https://kaptenhoki.net/contents//files/68955970988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=american+bully+top+linePDF 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_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 17352 bytes
SHA-256: 766faa3921456210d8abf3c69a2b87d9ff6304e9f7a1552a64f8c179e0d910b5
font_01_sfnt_off00011569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11569 10700 bytes
SHA-256: 415d01ebc01f8761c8e01205d71ecd32f753192161c6107c29bb911f9bda8b38
font_02_sfnt_off00012dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1