Malicious PDF — malware analysis report

Static analysis result for SHA-256 414299df1b38a259…

MALICIOUS

PDF

84.6 KB Created: 2021-10-11 02:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 47b430bfad64faa2b29a5dfcf907fb20 SHA-1: 61b078e498f336444357885b54b31ac64e92b717 SHA-256: 414299df1b38a259d1d57a5b7c75bf78f381761d4a5c79b36ea75b700e6cb4e7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to disposable hosting and compromised CMS uploads, a common tactic for distributing malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely a phishing page or a second-stage malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://dgxzz.com/uploadfile/file/luzuzurow.pdf In PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/ruwon.pdfPDF link annotation
    • http://agecarekorea.com/ckupload/files/guduparif.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/keporokumipadozixava.pdfIn PDF document text
    • http://tourgrodno.by/images/content/file/46509268035.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/65665012019.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/danaza.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/8249295491.pdfIn PDF document text
    • http://zenhowell.com/upload/file/31739720460.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/lolivesafudire.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/46621635540.pdfIn PDF document text
    • http://s4l.vn/storage/ckfinder/files/33819442244.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/33098303436.pdfIn PDF document text
    • http://ariege.proximeo.com/ckfinder/userfiles/files/radaterorijexi.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/32535925275.pdfIn PDF document text
    • http://terralis.net/catalogue_dynamique/file/sisebutonikitexevedi.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/ca9adc94a66f0d159587a7dd271d1c03/41366222619.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614af9525dc18---povotudofadudinu.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/98064813577.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/e1e592aae2202af336ae926b78a3fa1e/49624994567.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/27386804631.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/mipupaguk.pdfIn PDF document text
    • http://annabarons.com/files/files/10769272467.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/16027721444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=request+letter+for+extension+of+employment+contract+by+employee+pdfPDF 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_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 18520 bytes
SHA-256: 7133738f40970b4f46bd637968ad41bdbeea9a33cf73c91e21400c7d3df76e8f
font_01_sfnt_off000111a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BF 11428 bytes
SHA-256: fbe043c84dc5f4372daab7d9bfec8144f3b3fe38bae0d10a77dd3444a191c04b

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