Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ec48edc14d286f…

MALICIOUS

PDF

74.3 KB Created: 2021-09-22 17:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6ecb2bd624fe6b2368210fde7d36dafa SHA-1: d4bacfec4d99c19dcd9ef7ccb3edecdd4534be50 SHA-256: e9ec48edc14d286fe929c3f590fa997e2e141c009ce6295548d39c62943d2cba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains malicious content or exploits. The heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. While no explicit script was extracted, the nature of PDF link farms often involves embedded JavaScript to facilitate redirects, aligning with T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://abwalabamaave.com/uploads/files/rafibajekomusapib.pdf In PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161426b3edfb7c---34813159811.pdfIn PDF document text
    • https://renewone.de/files/21324004187.pdfIn PDF document text
    • http://boldogelet.hu/media/8903983645.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/78898207168.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/nudumevunatufasakex.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/ca7cbf9865ea75b6afe1a6fe11e62251/zafabojajatajatiwo.pdfIn PDF document text
    • http://rescue119.org/userfiles/file/4779177357.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/22658452211.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/xitefarifefoze.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/88914436224.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/89133566644.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/lewadununotetofevekitu.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/jewutivabozuzofulu.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/53305841264.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1614264d22e20a---likitoro.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/59494039935.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/rorafine.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/zubakuworuredukur.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614aee2ce385c---gizojubixiwuxuruv.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/17261266230.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/85962954524.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16141655436b6c---4972738207.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/vevivifokuron.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/witifulukuperinivi.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/35633408879.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/bupunurodin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=thor+2011+torrentPDF 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_off0000bfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE8 9996 bytes
SHA-256: 813ecd702cab592ae833cf36f1c33cd32cca39c7ee0a4d7e38b468df8a4d8c1c
font_01_sfnt_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 17480 bytes
SHA-256: 74e39313ecebb9e0a2bab4fea15ffbd0cf7180ab0ddc4e63bb4e257dc944c3c8
font_02_sfnt_off000103a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1