Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d2450ed25e96a2…

MALICIOUS

PDF

76.7 KB Created: 2021-08-27 06:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 33ee3b88c59993a7f96cec8cc5d1efb0 SHA-1: 392e7b8960aca7c86dc735e7e2be6e1fd7778e61 SHA-256: d5d2450ed25e96a2eeabc445ffc4ce70de7212af03111f7094838a761b0950fb
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://actorconseil.com/files/file/puvabufaxalamonuson.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/97236149411.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/86c98aa15178209de6a0ee6724624f52/23821763489.pdfIn PDF document text
    • https://msiutilities.net/documents/67116578932.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/59778417782.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/rolopofafo.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/65861773803.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099d33b7b6d4---tokepilovuv.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/36072515219.pdfIn PDF document text
    • https://raljob.com/userfiles/file/56742362367.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/66328868711.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/funovolirizozexikapebix.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093a8bdc81eb---90111944954.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///lidedeti.pdfIn PDF document text
    • http://huonglonghotel.com/uploads/image/files/6708901477.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0db76a580e279d910442a336bd001b65/kafisajidomuwovas.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/nufubujinetefajaguvibelu.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/gifamekezelazasesurara.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/4328060844.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/tupef.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/kipokifozijidenaruv.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/vofobetopawiweguga.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/3c0820404a24108fe135e0932d328ae6/lijonodusozagiwenedupas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=combine+multiple+jpg+files+into+one+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_off0000ca12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 15980 bytes
SHA-256: dbc5df27a615e23a6cec1755b0367cb5046c2edb0a7d416f14e795642b3b0061
font_02_sfnt_off00010b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B84 10980 bytes
SHA-256: 0ff18531c143073e0ff7d0d1061fceddb1c18e9e0e39725ccb8b4a4ccc09bf3d

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