Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddadf205f88f7f4…

MALICIOUS

PDF

95.4 KB Created: 2021-07-01 15:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 52869477a6b8af6236275d4ad12a5494 SHA-1: 794cf6f1ae3fb703620e0113d54d7fab980aeb8a SHA-256: 6ddadf205f88f7f4c1318a2e82f72ff36a523a4d3f47ba93d69551aeaef502b9
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links pointing to compromised websites, likely serving as a link farm to distribute malicious content. The PDF structure and embedded links suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72fb3f07be---9950941023.pdf In PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bc4a35fb5---xexizuxumitisatika.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/6e2364ecc967ccf410d87df7cbebcd9c/71811440884.pdfIn PDF document text
    • https://i3mit.com/shopadmin/upload/files/wuridelamanaki.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/676cdbf3198bdc6987679ad00239af84/97932923974.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/garupujef.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/j3fgkvlmp03rscsb2k8tgnjb2t/vibifujetalevadutod.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ee8cee63b---85517137269.pdfIn PDF document text
    • https://topupdana.com/contents//files/66739436899.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/93930485480.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de11fd5e3e---98838345580.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/afb59e11a7adee29ae58abeaadb5df67/43130121484.pdfIn PDF document text
    • https://shidoremicrosys.com/media/pidukarukufugamesujajum.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba8e4d732f---2047939619.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c68b048d310---batixekares.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/wotisofibivibirejopag.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/tr1um8qqruanv99i7a269u6e52/ruzulagorinarigalonika.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/26b0c83f9b07047c5894675585c7b33a/94388858311.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fd7b67e13---bagedepupizalejuze.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/bazokovafapegexelifop.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6ab7a4ffa---jimuwakisanewodifozaje.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20216112324586742.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ec8cf00f6---69913311451.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c2909b6a3---47449045779.pdfIn PDF document text
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/xiwefisujajagofogugud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=conscious+mind+meaning+in+englishPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E7 10752 bytes
SHA-256: aad887f7698bf40ee4b4e49340be477b7eac02888f704a318270468162cbf68a
font_01_sfnt_off00010f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2A 18880 bytes
SHA-256: 078f622da577526429fedf0648eed6a41d0ef16d587884ede23c8c9527cf23c1
font_02_sfnt_off000140c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C8 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_03_sfnt_off000155db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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