Malicious PDF — malware analysis report

Static analysis result for SHA-256 13014266df4b4dd1…

MALICIOUS

PDF

85.2 KB Created: 2021-09-16 19:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f6e8ea790bfccb70fae92134e4612d44 SHA-1: f9390526f5fc194c51a4da2dcd0e59d6f5fa7a3b SHA-256: 13014266df4b4dd14421689b0d08c4755b9f3a681fc7d9d4e5044ad904bc22d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e70a421bb5---vezenogenilavux.pdf In PDF document text
    • http://hangtatmj.com/userfiles/41230230597.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/76092402924.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/tekinubagipomud.pdfIn PDF document text
    • http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/ranomujufafeful.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/rugisobamumedozoxurek.pdfIn PDF document text
    • http://lex.tj/img/file/bevulogolibu.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///73581730963.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/20135731274.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/94d3efb16a25d4929d7c7c01e3c08726/nilelife.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/u35tdqhthv3606mbh15p1okh6b/69161531766.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/86066677234.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/sibotajato.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/gilodawojunitiluwemeb.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/rezinegofonobi.pdfIn PDF document text
    • https://quangtriasianwindow.com/uploads/image/files/xulipirumeduw.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/fidabuzegaduxej.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/99452334160.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/51372e434a721dc5f155e43c4b492465/63407148280.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/3194769021.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/sarapofisomelave.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/mifeliz.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/maginasotojidopuxa.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/48368223389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=the+necklace+story+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_off0000e7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FE 18116 bytes
SHA-256: 13226b25b4871afb44f718b5709729592bb8bf3963b8da272c3bf3eacd8f79fc
font_01_sfnt_off0001164e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164E 10796 bytes
SHA-256: 1a703571eb91fdef90fd765664c43ff57b2d9b5fbb4c4ee255606901a1053d1e
font_02_sfnt_off00012f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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