Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec123c332234e1eb…

MALICIOUS

PDF

85.4 KB Created: 2021-09-08 20:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: be5455be19625bd1d209082e7bb10fe0 SHA-1: 041c0da214dbf00aad9e4a5faa13ca801dc31f16 SHA-256: ec123c332234e1eb46dd67bf685aab9e482240ed329251ec97d0e163bacf578f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kenhuffbuilders.com/userfiles/file/43982933212.pdf In PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/83083062414.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/rijimofujumixefel.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/fonaf.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/movuludogizamufikopaka.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130cdc8b18e1---89823379669.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359787aebf0---8334770199.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/timeworobizujo.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/43463298723.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/94628546348.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/wumemibodudifinetu.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/49675349632.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/kidunawakum.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f66c263d1---jeniverebefumudisabuwirax.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/dudiruvuba.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/kajutidinatusimexovoji.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1630690908.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/3678011825.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/kudasebofosutelubamuv.pdfIn PDF document text
    • https://businesslife.com/content/file/28133193654.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/87638991754.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/xaviruwojalonew.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/bafuxitoraxosasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=foxit+reader+3d+pdf+pluginPDF 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_off0000e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 17504 bytes
SHA-256: 8546fa78ec2db135182bc50ce20b8bcbd3e238f494f9e66c8658eb2f3e5ce510
font_01_sfnt_off0001169e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB5 10856 bytes
SHA-256: 43b89ef30393441a8bd138e193e711fb8ae40ee1c08427991ddba839e0d965c3

Open this report in the interactive analyzer, or submit your own file for analysis.