Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce416111d2d2ef8…

MALICIOUS

PDF

78.8 KB Created: 2021-08-14 20:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f9fcfc63e76b2c3719397d460bf113ae SHA-1: 7f3788d76767c3e27602e473b9c35d136265f97e SHA-256: 4ce416111d2d2ef82b14a3c7cc7a797c491686903888b009acc3a2e931139215
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to lure users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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://fnb-concepts.com/images/uploads/files/xozixatofuvajukuzel.pdf In PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16095ceb84cba7---4764512252.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/290208269b4e9a76ed4617051699816b/24017841763.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e115f4be019---vomuterubivoxukuzumuxuz.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6eb8a31df---48756173830.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/38899601759.pdfIn PDF document text
    • http://mutitar.com/user_img/files/gafunibarafuwatikado.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd93041c84a---zipadebajag.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/mopaligiz.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/94410386018.pdfIn PDF document text
    • http://manajrgvaaradhi.com/cms-uploads/files/kowufip.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/27860941423.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/zukolux.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a176ae31f31---rozexezirebimewuvil.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/dosebesazar.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/fosebenegu.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/aagskn7t2o1u3rbkg4elm65n8m/14056983266.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/98857211767.pdfIn PDF document text
    • https://jss-moms.si/upload/File/titumibojaxax.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/37986806175.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/6aaceb210e61216f1925eb9693a08901/54285866660.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/bcbab0f9c679f66ef6c79f660870ad83/44771649119.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/8ilt044irdbkb717oq478dvlg4/fibagitudowepugomav.pdfIn PDF document text
    • http://meta-min.com/files/46414017794.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607eca94e7274---wofuzufimawifadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=download+pokemon+mega+emerald+x+and+y+gba+zipPDF 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_off0000c9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 11064 bytes
SHA-256: 71cdf4b4ebcd3eb9d3fcd694dc15d94a66479e1e3957acca43f6dd4ddc8562f5
font_02_sfnt_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 19004 bytes
SHA-256: e4dd496213f775b2dc355b7cc7b4c01c81315105a79b485fbc6e7522b3102a35