Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad6bb2209529d49…

MALICIOUS

PDF

80.2 KB Created: 2021-07-03 15:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 615918ea3c258e312886b58c446f696d SHA-1: a34c61382ebe8a08cbd7be03249e3298bd6a3a48 SHA-256: 5ad6bb2209529d49b65c31c3846a36073ec917d2f061911efcf200611aa99667
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress upload directories or disposable domains. The primary intent appears to be SEO manipulation or directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://bloomland.com/sites/bloomland.com/files/rasegonupelulewajakiweko.pdf In PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/9iffoh4lchrpk27150uuq1gmhv/31880189978.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/65332643903.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/mt520v8cucqjk79psg180ng3a7/vavexebixozetupu.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/kunadurugo.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/bg1nvhflvrvbrn523hhtg9riks/nezekozije.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/6456008244.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc6582682c---79286550182.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9a04a4b4e---juborobuwezopenak.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/i9dukbop0q0qfrvigvftahrdus/49035967379.pdfIn PDF document text
    • http://raczcsalad.hu/files/vudopefivazerotudapafami.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/c634c608eb08f88c5f2c2b57af1c9a0a/24597231343.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/71246bbe5738673da0bc96279ad8aafc/998224095.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/tiraxidojijavedokur.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/d88aba19e4c2dc0a2b640b51ffaaf67d/najogugurisunivirupa.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/gubifuporuzeradiminoz.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d34caaa4e2---8598686064.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/zoviv.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/om4sr9a50338123sf325jqf1jk/bemepuzalobarurebukosufiv.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/23932658216.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4b417725f---92252188262.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=difference+between+plant+and+animal+cell+membranePDF 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_off0000d6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B1 16964 bytes
SHA-256: 9c6dd64a4b201448d930d45f9951fbe81159bb8bba9949791f031f577bd0c35b
font_01_sfnt_off000102fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FA 10720 bytes
SHA-256: 5703b439d21b70ddb163848a6cca3edec7ed36e889a8f0c82dc75f76d569cb42
font_02_sfnt_off00011b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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