Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfe67c2ce34a684…

MALICIOUS

PDF

74.7 KB Created: 2021-09-17 15:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5a9b7bea64368b9300eb244b7f6157bc SHA-1: 67a8acdc33d410b087d76d97becc872bbf939a08 SHA-256: ccfe67c2ce34a68404750b672953fcff3a7587aff55049d9d34724203cde09fb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • 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 https://chcial.ru/uplcv?utm_term=i+want+to+know+the+meaning+of PDF link annotation
    • http://karpatskiles.ru/store/file/rivikepekogadabasevonu.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16135e4e37256c---musadakideri.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/pajboabh5dl7ps4acih053ljna/86326090242.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/78743318468.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210911_17098EAC3A572613.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/84840945917.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/54050816453.pdfIn PDF document text
    • http://fivelscope.net/fckimages/nenogumokotexegatiba.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/xajadukenivogumarusitoxe.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/pefeluxutosakal.pdfIn PDF document text
    • https://ghnservizi.com/file/1609496138.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/96250404004.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/daregibuxo.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/falumunebasixunaj.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///39563319149.pdfIn PDF document text
    • https://teamcode.net/upload/files/ronubexatofokonolozidi.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/80651148895.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131421c97d02---60985775424.pdfIn PDF document text
    • http://iviltra.lt/images/files/xodiloloraxodopafokoboxas.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/520bdaec1da3da0189228d05b465408c/nawekirof.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/29485297841.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/papexigurodiputanubuviri.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/fekumojuri.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/46995650498.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_off0000c37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37E 16276 bytes
SHA-256: aebec3e3a3bc021c6dfbfdaff60e9e1d598396a39754f6d4ae587823bb9d6789
font_01_sfnt_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10559 10476 bytes
SHA-256: 01086853f7ef7efe9ab0dbe80ff7c0195e1ced7fbe84d62058071acf0c0fc3a3

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