Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6b2936cbd8f0c0…

MALICIOUS

PDF

81.4 KB Created: 2021-08-18 15:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 7e0b52930d633cab200dee080abe4772 SHA-1: 35b8a971b9bb9e926aad2375e13329a17ce48a61 SHA-256: 2e6b2936cbd8f0c0655f27a84c8d6ed03eb7c1a2e5ba36ad816272f9c655eb5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/3ju6musvvrtm4om5jc4ipj0e51/naponoga.pdf In PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/5c90bb2bd0afd0f68b9c71d59ee13fa7/56314018434.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/xalurafatewiwufawizuxid.pdfIn PDF document text
    • http://modern-pro.ru/files/file/66396658324.pdfIn PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/liramoneziximo.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/22288534439.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/84311588649.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5cf7706b39---tilezilulemipibo.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/lijek.pdfIn PDF document text
    • http://relatives-united.com/clients/75139/File/12292151225.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/20004485076.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/8035310650.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/d523bc656f85a50ab122e8f367e61b2f/podekadiguwexekabeso.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/4e5919974930abb24db3028b2583a88f/69246400137.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a23d5d8ef1ee85ab08106e8eec586086/bodufuduputelu.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/voteroxebiworokuki.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbaf9e630f---gezelasojulubi.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2baa5b14ca---18137993967.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/faf88faa616c4cf4936d113a3ef8886c/43803651737.pdfIn PDF document text
    • http://nsureunion.com/clients/71556/File/valebos.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607602c4353be---83895037003.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/xenosapifolato.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/83143533279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=besyo+tez+%C3%B6rnekleri+indirPDF 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_off0000d7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FA 18692 bytes
SHA-256: 124f031dcb37ab3588f912900d7f0305bf872044dd89682091df32f7ef6c6bf8
font_01_sfnt_off000105e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFC 10612 bytes
SHA-256: f706d9534f99ece20349d48c2296304f7d05dcab176a3b292305b1ff4570e006

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