Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbd29147e1e19d9…

MALICIOUS

PDF

75.3 KB Created: 2021-07-03 05:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 36ef3575afb742d63d018355fdbf8803 SHA-1: 92add7e6c2235e1edf68a1e46ebf293360774e48 SHA-256: 3dbd29147e1e19d9efc8dcd2c3bc5278f2613022b72370c88d137e2c1077777d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to a variety of external websites. Several of these links point to URLs hosted on compromised CMS upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/33d25d96d00c40e10bb3d39a4acea3e8/nufalareger.pdf In PDF document text
    • http://austral-immo.com/userfiles/files/20348967923.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/jeguvapulilovilibul.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/8962555918.pdfIn PDF document text
    • https://daismene.it/file/beneweminamaru.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6d6440f90426364588288d3b592b7d79/wefopurexa.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/fc41149e866c771a47e6ec702b9912c3/12954055155.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/98235367974.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/pafuwoxalejozex.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/239247d0fc9e6b2d6985c8bb29f39797/89002649919.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/35648710033.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021052820504590.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b802f486da0---zunulez.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/72621245346.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16086115d6ada8---45966086080.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/51308421120.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609456ad5ee4a---24107204921.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/fitexelunimugugef.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/6b574001f953da2a2f9b8ad444057653/294470022.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/hhbk4ta5u4r20t2fl6u63ejbfo/xirevalugexagikidexaxer.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/9c4fdaa7509ecaaa68fff190d5aaad09/pupazaxof.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210629_16E7D4C7FCB20726.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096354f412e4---tuxifufovelefozalufiwilu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=chapter+7+vocabulary+review+worksheet+answersPDF 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_off0000c538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC538 11152 bytes
SHA-256: 8101aa49a15947b93766cece64c195307f4592a910702b0371a8b9250bce482b
font_01_sfnt_off0000df2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2A 15884 bytes
SHA-256: f0897f0422d6e0b7bc27cb2f12788555feb89e4e8805166c2a7a3ae964389443
font_02_sfnt_off000107d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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