Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d21bb8e0f1fac6f…

MALICIOUS

PDF

86.8 KB Created: 2021-09-17 18:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: abdee219a24c1cecdfd2e6bb6258ac6b SHA-1: ab5dbdeafd6df2849490f79c4f4f9be92ddb9168 SHA-256: 0d21bb8e0f1fac6fae8c3e11de15f98a70b2878d8568945fcfada6b64909163a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous domains, many of which appear to be compromised or disposable hosting. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be instructing the user to open a password-protected archive, a common tactic to bypass security filters. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=updating+android+system PDF link annotation
    • https://nghiepvu.udicmanpower.vn/uploads/news_file/feluziwipilisavagejora.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/14188787565.pdfIn PDF document text
    • https://parfumzone.ro/files/file/23340775.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/58020954501.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/26167889018.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130845ec67b7---10287298839.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/85479033282.pdfIn PDF document text
    • http://wiskind.com/filespath/files/20210912082357.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/40557441666.pdfIn PDF document text
    • https://glozor.com/userfiles/file/48307064670.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/ffba139e7c98c021aea7d129630fad83/juduto.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161402a89c6806---sowusutoma.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413a8fb7a4d---55993021757.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/25148167728.pdfIn PDF document text
    • http://le383.com/uploads/files/witopu.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109160733472496.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/texukudupepuvasudozux.pdfIn PDF document text
    • https://allianztc.ro/files/file/teluluzipalozuva.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/23754943916.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/6bace8224a47c69d52ad9dea180bf514/tewojobotupiditexeb.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/parukawojajidazexiwidek.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/daveteloba.pdfIn PDF document text
    • http://tiquital.com/documentos/file/69271603524.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/wubaxo.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/fojuledutajuferig.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_off0000eaa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA4 10812 bytes
SHA-256: 101b439edaf3e4a89203f83656ac838062dba8b5c64f6333988d8a6bd1f2b45a
font_01_sfnt_off00010364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10364 19276 bytes
SHA-256: 0b71b51dac826f352d1ace4aa5580d2fe705c335becc257d23e49068fe6cd879
font_02_sfnt_off00013587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13587 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1