Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3aa6701afb0db2…

MALICIOUS

PDF

118.9 KB Created: 2021-07-21 23:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 315e66dfcdd956fd280481e6919171f1 SHA-1: 3b701b939f2d1cac55efb1f2af90aa0b72c9353a SHA-256: 0e3aa6701afb0db22e1fbafd2e3d226e67ebc4455ed94c32e857fa5eed76854d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/abb1552b05563993727d863f04ce07f0/34439314028.pdf In PDF document text
    • http://maroba-zirndorf.de/file/rinilefenobobem.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/62ec9ce1c303e4a292ba50c8b4285496/85818500687.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc901e53a---26600579992.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/42358055900.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df9c8ab88f4---29665520661.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/veluzejifetupefifi.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/ea4e6c7864e342c94f1a1f30e895a236/dosidekogumipitofe.pdfIn PDF document text
    • https://ancoraeducacion.com/images/torozim.pdfIn PDF document text
    • https://stvorki.ru/files/file/tidatinamogabox.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160edb62e693ab---gavonosedijikesa.pdfIn PDF document text
    • https://bamor.org/userfiles/file/nuguxabuvukopixaruz.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/61930028228.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/42999986734.pdfIn PDF document text
    • https://anfauglir.com/images/file/99107051149.pdfIn PDF document text
    • https://callalilyvn.com/upload/files/45880692905.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086477ea3bf7---witemajazokajejejipatur.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/zozujolumuwedevi.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61cf52a09d---bivafonoz.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/lulugupolulixen.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/86494340205.pdfIn PDF document text
    • https://kham.vn/userfiles/file/51375354695.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=shops+that+sell+hamsters+near+mePDF 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_off00016d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18524 17788 bytes
SHA-256: 906d3a3b5aa0b4c68830bc477f3c8858ac2af43d373ce91dfb2528ceab5c1dfc
font_02_sfnt_off0001b3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3FD 10500 bytes
SHA-256: 000d8335e5a7e0d198706f452f7db280feddc7b071f0afad01297de9a68d1863

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