Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34e72d0849cacb2…

MALICIOUS

PDF

75.2 KB Created: 2021-09-18 23:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6f5727557529910647289777eecab460 SHA-1: 36a14b70ee5115b684fe2ec4e92268c90cbb5784 SHA-256: f34e72d0849cacb28d088464a88f8a959463d3f7f9ffc453849f3700826cb806
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a link farm and the nature of the URLs are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://moveo-sport.pl/userfiles/file/74730860401.pdf In PDF document text
    • http://sdds.be/userfiles/file/nivaparetaw.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/87226368774.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/judeduzomoxijapano.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/vavadokigotixujet.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/xanawemujisi.pdfIn PDF document text
    • http://platcometals.com/images/file/labolada.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16134e023a8219---84459637533.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/jazujipesi.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109051637589746.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/1964586455.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/ganapigejanuwoduwot.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/wubovedixalaluva.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/1807203337.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109071125263451.pdfIn PDF document text
    • https://dm288.rs/slicice/file/32984844025.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109161447084863.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/6330573cdfbb78d07142ad3bebe170f5/92481942933.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a865c1cd4---konemijelekarefonim.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/kudegasoxugesokuniz.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/99527940596.pdfIn PDF document text
    • http://autoescuelatosal.com/galeria/files/92521616148.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/rujojevesizivadaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=redmi+note+9+pro+support+30+watt+chargerPDF 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_off0000be5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5F 17328 bytes
SHA-256: 53e36275174fc1bf53dc869a6c0d7e982f0e8853463185b766abbef5c9710de9
font_01_sfnt_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 11608 bytes
SHA-256: 2fc45f73228e1b9bfea53be87bbfb90f73ad76e99da951252dd32f1eb05f3ad2
font_02_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1