Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3eb3847da67e6ab…

MALICIOUS

PDF

87.4 KB Created: 2021-09-06 22:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0c168cab1cce61b428176025d1bc83d4 SHA-1: 234531ca492ee86e794d90b9cd326c1d3b6853a0 SHA-256: e3eb3847da67e6ab4f0cf12be7841fb5266da6720e894ed77a5b571b73b9e5f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://garglob.ru/uplcv?utm_term=lumens+to+watts+conversion+chart+pdf PDF link annotation
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/df00609db9498c27f0b668f486e8235c/mopowi.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/0a23fab375c9796c4a96a7a9a76124eb/23387246651.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/44030979f3d3ccb8b56ce631915c12f5/82333221973.pdfIn PDF document text
    • http://blueyee.com/upload/file/280837168975.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16214807010389.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/jowupaxifalibifegonol.pdfIn PDF document text
    • https://globalquestconsulting.com/userfiles/files/suguburoxamajokawupow.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/90300215031.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/27082263540.pdfIn PDF document text
    • http://dobermanncz.eu/files/53659951970.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/14021810959.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/67981939594.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/vawigazitewo.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/5831904330.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///kejafuvimikurekoxukoju.pdfIn PDF document text
    • https://cubic.is/userfiles/file/xapunitusafopip.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/muridu.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/mojaluvadafatowajofasu.pdfIn PDF document text
    • https://tepihtrava.rs//files/nuzilubamebesike.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/pp4hfc8ago55r9ghav0gv1kfn5/rosuk.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a226ba2a364---veredolumutamisukexabiv.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d791d80ecc8---jekevosawebufi.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_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 18344 bytes
SHA-256: d6280f9b22bb61f65b4649cba4d86eac7bc45c6a4c14383c9d867f116f198403
font_01_sfnt_off00011eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 11048 bytes
SHA-256: 0d521b9b05c7f840c537d294592495823f4887571b98919fd9875e9faada2142
font_02_sfnt_off00013850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13850 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1