Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabd84a3697ee9ea…

MALICIOUS

PDF

84.6 KB Created: 2021-09-23 16:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e21c0be66aa494470f14c53758a8014f SHA-1: d095c3831798f98a4d2966ab49c9ebf9e9f4e118 SHA-256: cabd84a3697ee9eae8f1a962efa0ded89119813f6cf348cbb480dcabe2b403b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to disposable hosting or compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crewmak.ru/uplcv?utm_term=billu+barber+full+movie+hd+1080p+bluray+free+download PDF link annotation
    • https://mkart.it/uploads/file/kovoxasulad.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/nofilalikut.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613f58acf01cc---bimonezesojiwidixekevilon.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/posojogaviparadopasawi.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/90234901801.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/63089481650.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/womevoparudewuseravek.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/pevowuboxomapulabexozata.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20495309050.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/bipejunanapetoninokabu.pdfIn PDF document text
    • http://mobilaide.com/upload/editor/file/pazorududibazir.pdfIn PDF document text
    • https://webkapper.nl/ckfinder/userfiles/files/muluronenabe.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d6f7dd97b---88762270524.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161445cfa837b1---75236418276.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/86067252504.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/sodalemovufepefagen.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/xugafomewave.pdfIn PDF document text
    • http://web5gstore.com/Files/files/wiledutivusabuvadiralevir.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/nemowibajorodetibode.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/xibonarenoguv.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/94919507616.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161435355f3c49---5886388169.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/45706332463.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_off0000dbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDE 20508 bytes
SHA-256: 46230bd2d270cd506d5836bc34fc09b25a9d5c3cd68f33e701352d77de66fea8
font_01_sfnt_off000111dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DD 11436 bytes
SHA-256: 98b8ae0e2a8474781f0aa4d4b5b2d3a59c4678013467b220391a18d0d58535c8
font_02_sfnt_off00012c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1