Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b008346851f3464…

MALICIOUS

PDF

83.5 KB Created: 2021-09-07 15:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e432be410632afbe25533382c3c5acc9 SHA-1: 16ef8a0b7abd1d6fc11ca202b9f18c9ef6eea6cd SHA-256: 9b008346851f346423498c89f60738ad3cf7bc23eb99d59d57e981c33e20ac6b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to compromised websites and disposable hosting. These links likely serve to redirect users to malicious sites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://wastran.ru/uplcv?utm_term=tanita+bc+730+manual+portugues PDF link annotation
    • https://nadinerogger.ch/userfiles/files/zimekodunefudofuzami.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/jopesesufinoze.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16088ad94da135---wuzozovateneruluvoxi.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/8c8dcfd9b0a0540f9041372dae90545a/68953425280.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/kebufodosawaji.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/munutarijologijomunej.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/vf1spg71c7vb0ae6e9hl4khif6/3685288301.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b72618b925---naxawemexiwifesixib.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/26443467156.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210820_EE8A093CBB9C342F.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/ltabi1k2uo2av9as9q467o22k7/44951483806.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/vudosiwaso.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/joropiraruwuba.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/83556867343.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/33840417579.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/xaledebajipopil.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/3d0298aeb1174ef08d61d6eef023d7a6/gezofekonakageberugew.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/e30ec5e8133def721deb5432c22e0854/nejijuxabok.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792e789b115---4515600455.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08502c96a5---92921299801.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/boj3cppsmdrg485pblfiijbsg4/71430048220.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/potif.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/5825aca06bd7928558738c4ae75f2e50/sovix.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD867 20328 bytes
SHA-256: 0a8a1d19a25ea271c02bfb17888788b6ace73421c47c1e3ace1e54b886d11b30
font_01_sfnt_off00010e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 11264 bytes
SHA-256: da13bedb37479f856b6dd25b382035b1f9a5773f3de8bac056e26365f9cddf80
font_02_sfnt_off000128c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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