Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8d243473841161…

MALICIOUS

PDF

91.2 KB Created: 2021-07-25 12:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9a028c80c91dac6020cf0c4ecb221bd4 SHA-1: 9b3e0062f468b46b8f328e888f85f4a09ad1c407 SHA-256: 2f8d243473841161b408e6fbcc1d562820157853a1ee49c4d055d7b546e00582
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous unknown websites, many hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple unknown URLs suggests a broad campaign to lure victims to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/dozutozoza.pdf In PDF document text
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/57274143980.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/1223402669.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/no7t54macshhsrdoq2rke6tola/zurepajajametavasevipo.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/suberijizamoxet.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/ziwirefomutud.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/vujibarozikoguwopuwisibod.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/savebabafinipepepig.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/51003264068.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/d899593861eb799068a8282287c64514/25569873274.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/7227052c1cd8e0e74ef475d5479203e6/katez.pdfIn PDF document text
    • https://vicentinacentroautomotivo.com.br/ckeditor/ckfinder/userfiles/files/pirogo.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/tinugiwepu.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/wupabuvozafojezeserazu.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/kiwavata.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607187185d4f0---60545714948.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/lafuxojuxujotika.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/ditaporekowutufozuk.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/c15541a1bc57b2a5f8fb4c69ff6df929/nituwubulakupabewiwimez.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/17862ed6c6b2c3853a8d50127afd2b6d/73597531353.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/ddce567bd5d88aa8f6ceb88bf1f04c58/nuvixiluvegelimesot.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/batumotafamajuj.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/budulutosomorexo.pdfIn PDF document text
    • https://projetovm.com/uploads/files/11093556682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+know+if+you+have+an+mcl+injuryPDF 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_off00010175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 16976 bytes
SHA-256: 6a9a926f55d65f834c162e2168d42c7e566fd2291d62cb850449329d1d85db12
font_01_sfnt_off00012da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA1 11012 bytes
SHA-256: 30fdf3892d50644b4978c58cba331de64653bd399824cf765b4026d67dd38c22
font_02_sfnt_off00014708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14708 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1