Malicious PDF — malware analysis report

Static analysis result for SHA-256 471d09d4401dd045…

MALICIOUS

PDF

78.4 KB Created: 2021-06-29 13:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2be591f3e3be4ce863958cb692a8c512 SHA-1: 656483eb4bd4bd7ce47f98d577e06cd8c6d369a1 SHA-256: 471d09d4401dd0451e3a43c84c6295cc6fa3fb1ff2d4b0b477550858065a2fb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://inwebjor.ru/uplcv?utm_term=what+does+p+hat+mean PDF link annotation
    • http://yuanyoujie.vip/userfiles/file/siridazivozunarosume.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/d4830da0262a2ae53a0c5fd1f5a2cd02/pobemewivixudu.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/97961087385.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/95e0534dea0e29a8e5eaa81bebbda922/didubapawokiwasopiral.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/23486799564.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/wuvaluramilerivutofoseviv.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/d814104962b08e6b4f5549b3ada13350/xupavosisibusumowil.pdfIn PDF document text
    • http://skncn.com/u/files/95929234676.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/10887832545.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be5341f4174---30348842116.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a59f0d49352---66381964484.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/43557678778.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/4c6129a09a4c5ef6f9c28a35209e8bde/55710741138.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160738a010a077---repofupomutodovud.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/mifejonosasugudasajeloziz.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3d2ec0a52---xanaparekaxunekodefisuled.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/81d3eb6e0cefaa15f4a668e57c7e3569/8301914353.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a3fd54934---88532984698.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083221499e0e---56752693942.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/9ceebb3632bc38f19aed21721db7817d/44141868179.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/53898395261.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/fekasefanivagamob.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/462be10d64fcc9002e99a1f94ed4c105/nuwopusif.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/wawefekokoxitudade.pdfIn PDF document text
    • http://safetypath.net/cms_images/zasuwo.pdfIn PDF document text
    • https://dejavuruse.com/userfiles/file/48371392233.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0E 17232 bytes
SHA-256: 52d70088818a2740269b77068b60ece1bda71b6da16d0a5aef212433b66b4183
font_01_sfnt_off0000fb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 10412 bytes
SHA-256: b4095341dade0f5a408efac6e15896574442a54a0d432cf5570768bc8b6c7b0e
font_02_sfnt_off000112a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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