Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a6d00e55fc5096…

MALICIOUS

PDF

82.2 KB Created: 2021-09-08 03:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2b89a111fc379a78dae279c69a498d45 SHA-1: 9bd4e7c2d3d936afb1f7474890deb2e710fc3a42 SHA-256: 24a6d00e55fc50969274dee66dbfda37d0f979867bf9b0efd0e33014da01483b
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to various compromised WordPress upload storage locations and disposable hosting sites, disguised as loan forms. The primary goal appears to be to trick users into downloading further malicious content from these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://artepcb.com/upload/files/95948877185.pdf In PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/771f3f9f7d927cd11d856971d5aff317/99153594985.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/porenakusekotizat.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/46801572433.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f1220f02f---18084350432.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/jifoluxixemutugame.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/18298433414.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/qobgm98feg0prcuvd50bu3gkd7/biliresoletemakobugodofa.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/idcqdq191vaoq1pkt1kk2l10la/95706548895.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/880e67d6af43508fd3f692a5df0db1f4/39037215163.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/171ac2ddef34583e9c40f5018c68c154/16039153805.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fb994b759---makobatepu.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9ae3bd72bf---xewerugopimalo.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/tukexubewuvin.pdfIn PDF document text
    • http://splogservice.ru/content/files/wakumowanuwabonixal.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7bb669afa---vitif.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/wesejojikuvumovopuzorub.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/j5igcc67robige7cjt3ju9ejq7/59707209585.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/50eb75b804aab35a936c04bae6698d63/nitazazamezifer.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c90f07dbd0a---jamivanigufupebupenivad.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210804115119.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16123462b2f935---vokarizukofobesewilujen.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c4b8e5b3---6306940802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=equity+bank+loan+forms+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_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 19676 bytes
SHA-256: 05435c7193263b77d04f7a0900738a1996b4bd6ac8456932997db9f2567063f2
font_01_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001220e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220E 11104 bytes
SHA-256: 079df23acdc08d8b747291c05eb4a213562e410eb0e4525617f530fec868a7ea

Open this report in the interactive analyzer, or submit your own file for analysis.