Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee202b92eda58f17…

MALICIOUS

PDF

87.7 KB Created: 2021-07-21 06:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9118e05875e91fb5921ea75e6ce315f2 SHA-1: 3e40863fe2c56cd845cdf81831aab49f6191576e SHA-256: ee202b92eda58f1769a68f305b86cc0bc9b0cf2e32ba9afeac99201926adb382
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing to multiple external URLs, some hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing sites or download further malware. The document body is unreadable, but the heuristic firings and URL analysis are sufficient to determine its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ovistar-dz.com/ckfinder/userfiles/files/kiduvuredaxudenotab.pdf In PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9f2c673f1---bonanuto.pdfIn PDF document text
    • http://keramann.ru/uploads/files/37516872566.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/3548451842.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/fekozo.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/88442419537.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/29ntaoj2ec8541t1mokvk18grn/lopumub.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/62ca3810e0c1ae6557fb8dd17627771a/18299319573.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/5918422157.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6c767de5---tilefutokevurowumijotin.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cca7d85e77f---34233664299.pdfIn PDF document text
    • http://camwater.org/media/files/97394109275.pdfIn PDF document text
    • https://shidoremicrosys.com/media/18870340329.pdfIn PDF document text
    • http://budka39.ru/files/korevijukinamubovop.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b336cb1bc84---24240657270.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e6398c9f6c3325a8b4284232c3513316/nisepuwudupi.pdfIn PDF document text
    • http://mesterek.net/tmp/guzozawa.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6b1992390---zisolofesedulozibimizid.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af8f3884a4---talisopomaxawemonigagorud.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/xiwisib.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/gunosavapuz.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/51f3b2105b42633589cb63d514ca7fcd/46798901300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=oracle+sql+tuning+interview+questions+and+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_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A19 17504 bytes
SHA-256: 51caaa9b3c89c563c8266b8e2531da0ef83ea92b58f33b7764c7bb9b039aa901
font_02_sfnt_off0001383a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383A 10968 bytes
SHA-256: f4e4098941505bb2c7b1d707db4a6e8caf36aa8c8fce65041c81900161ea2bfc

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