Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c2f10836fd87d1…

MALICIOUS

PDF

89.9 KB Created: 2021-08-19 17:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 053f593ca9344a6676d17ba0270ea920 SHA-1: 86bb576d714e31b5a43fa14aa1d23a3eb82486cc SHA-256: d5c2f10836fd87d116170d86af825f85caa9e6457a7e35ab6b59d82b11da8b18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to lure users to malicious content. The primary purpose appears to be redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a61142eb5d---wuzuvadozuraduli.pdf In PDF document text
    • http://www.chubsorn.com/file/files/44757131993.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa84ac7abd---5720917163.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/5520e50e5b7d533a212148f34013e00e/18421795582.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/3c0501a6db16bb9ac9e4d094aa3c484d/tidurajuben.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/45117903181.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609440fc102ce---12443541697.pdfIn PDF document text
    • https://oversaslogistica.it/file/zalujukegafose.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/47107082209.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/pojipukorovivifawu.pdfIn PDF document text
    • http://precisao.net/files/files/41708694035.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e37d2d99f0e---69397987851.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/sarivakidimawif.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8f01c4a55---dugelorofugizazosidazoder.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/29a4659c56e5df92ec48735bceb21e0a/puvimufasor.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/232389365.pdfIn PDF document text
    • http://dsraxys.com/uploads/51055782405.pdfIn PDF document text
    • http://iltorg.ru/upload/file/49072261494.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/77339458343.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/51605880380.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/64159449658.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fddbe575458---feguxomowavazolipex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=noktalama+i%C5%9Faretleri+ygs+%C3%A7%C4%B1km%C4%B1%C5%9F+sorular+pdfPDF 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_off0000f5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FF 19052 bytes
SHA-256: 19d7a4fc60343361267c693f04417eb065eddbe7f681ccb37bcf483aa1fb480c
font_01_sfnt_off000123fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C13 11508 bytes
SHA-256: 5fa44df981739a25a52fbb63a47e56c9d5d0bb0f14fa1fbe99b6c677843d568d

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