Malicious PDF — malware analysis report

Static analysis result for SHA-256 354e4e375dc61fdc…

MALICIOUS

PDF

78.8 KB Created: 2021-09-02 19:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0a6006a72f5472a6016f26b53ed101ca SHA-1: 5a4d02b184ac1b6604b351c0696b6a089567ddfb SHA-256: 354e4e375dc61fdcda5f1d4e0a42b1e1112e3ef65c4196ed2435ae93f629ab97
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://smidgel.ru/uplcv?utm_term=educating+rita+play+pdf PDF link annotation
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/bd0fa7713b96030b57b2fef481bd1c5d/16292253753.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d791827cf5---9240789290.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ec1576733---guzunil.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a6a6a505b56788082a4ba8b0d9777e0c/66212947977.pdfIn PDF document text
    • http://deforma.it/userfiles/files/55244490790.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/78193730814.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/dalunikatikogalukebov.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/21419173559.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/37928012fd65d3e2392bd93228d93d52/fojasezivisap.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/22907460201.pdfIn PDF document text
    • http://theettiaresottawa.ca/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/44156992182.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/33081681450.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7ee6jnvi04eenisbfg7kg8hf94/dudoxume.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/51ad6241c2b98b8f71990d38dd73709a/xezojokalabukivozi.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/malupefevesifodukaxok.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/80398510821.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/80679312993.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/04a12ffc6956e603093f5302c591c49d/xovebujamo.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/dogunodijowid.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/4d48e9f25336ce8b53289a9e87966b7a/naxaj.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/pvuksadd8871996kls1j0mdmd5/75401610197.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3f328bb6a---22750379796.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/1108c7c6663c5ae1544964471f8a9972/87606780382.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/37553550192.pdfIn PDF document text
    • http://chongros.com/userData/board/file/mapoxo.pdfIn PDF document text
    • 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_off0000cff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF2 10572 bytes
SHA-256: 77f7f2a55685ddefc5a0a0bfbcb77d3ebcd2e591c778286e457190961373b4c2
font_01_sfnt_off0000e7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 17564 bytes
SHA-256: 963799326d900ae5871132ebcc49c0a2c9e2e12115c0dac2a748bf51f1daa7a4

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