Malicious PDF — malware analysis report

Static analysis result for SHA-256 214765caa56d2e78…

MALICIOUS

PDF

122.6 KB Created: 2021-07-18 11:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 905dd1a4103a42c29b167a3c7ffad447 SHA-1: 3e3f0852cf153ad58432cf176744a0b41c94be98 SHA-256: 214765caa56d2e7875d0d647de15a1b3bd602afd89c651d434dafe5e2bf26aa4
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 WordPress sites or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 http://sl-light.ru/design/img/upload/file/panesakidoto.pdf In PDF document text
    • http://provia-events.de/pics/fotos/1/file/gukuduxuwegowameken.pdfIn PDF document text
    • https://maisonforville.be/documents/file/47482197022.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75485851203.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/7495020317.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/78643027771.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609b55ddbc150---tomujunuz.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/kilobiwewu.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4229f4d5d6---40602399767.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16ba0165c---2011729441.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/tunetip.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/meditogi.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/66746855.pdfIn PDF document text
    • http://cuatudongbinhduong.net/uploads/files/28704516075.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d4285b6b5---mapefinorafobetawazux.pdfIn PDF document text
    • https://mattress-leader.com/media/99275179444.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/46838717217.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974982bc8ae---22879252218.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/gakesemubotufaf.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608de31492cb2---9617949303.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/b68bd5a0ccbca0d17e642ceff04b2f7e/renevobudazar.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e54e410d43---mabopiranowu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876d9bc0c4a---zopoxamagurafewovumagobok.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a77f10478d2---47898893234.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/q4994r9pjg53cki715rlm3hk8q/kipod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=tak+the+hideous+new+girlPDF 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_off0001773f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1773F 10768 bytes
SHA-256: 00b44b0fb7a9ba712ff4ffb99c5cf868fd84813dcbaae9aa3c84b237d562707e
font_01_sfnt_off00018fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FD9 21380 bytes
SHA-256: 9f5e7e25cf8c6e51e61ee55827c81c93cd19dbde91d833699019f69ab9eb9de8
font_02_sfnt_off0001c38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C38F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1