Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6de275a939323fd…

MALICIOUS

PDF

74.1 KB Created: 2021-09-22 11:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1bbeccb6a045465d9fcd8cf4ccd8b41b SHA-1: b0130564e35d9684729c8b03b2b7dbfb14678591 SHA-256: f6de275a939323fdbd287436aece2faba1cf072f690daf7262ebd000ff2bd2b1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=indian+idol+junior+winner+list+all+seasons PDF link annotation
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147a5139e296---bukiwoj.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/redevawokewuni.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/lunosirisitusijowi.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/37319863244.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/30213725885.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/fobirexakenezepalet.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/nadezizoposukokewolila.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/62667111851.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/3434122682.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/56271313630.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/gilabavedutebad.pdfIn PDF document text
    • https://pnvvr.ro/userfiles/file/wapogoze.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/sesutajomiwojidotuwux.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/69032106253.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/96887529187.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/65710482401.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/puvonomakozagupafonos.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/zedan.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/82645324790.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355c2618100---vepozowipaxixuz.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/kotonesogepepusa.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/neferebivikesavo.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/vopoluporosuzexaw.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_off0000bee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE1 10508 bytes
SHA-256: 554201c27118b1d13d0a54e0ca1a856f3620d4bf30650b378430373ebbf34e14
font_01_sfnt_off0000d6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 17080 bytes
SHA-256: 146c33bc5a32b1c198db22fbabfde19c89e79cfde7688ee9e357bd408a300e36
font_02_sfnt_off000102c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1