Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb70f0a8d62fa4c…

MALICIOUS

PDF

74.4 KB Created: 2021-09-06 13:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e4580eff0fe199c37cb3f36063c84e04 SHA-1: 89e628ad8e76c59dfd280326b6f7af3cd701146b SHA-256: 0eb70f0a8d62fa4cfce959c6787c162b0652b3634780222b9fa44f112ba384c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that function as a link farm, directing users to various external websites. Several of these URLs point to compromised CMS upload directories, suggesting a potential distribution point for malicious content or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://garglob.ru/uplcv?utm_term=free+online+pdf+reader+converter PDF link annotation
    • http://aliotoconsulting.com/clients/862286/File/9210565605.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/21958ad304d275c68a66dc88eea43d76/dibugonelagejomemufo.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/bakomane.pdfIn PDF document text
    • https://agatanorek.com/files/file/tafiporumobofad.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/anb4f0sn6b1f7hfrdcpivf23i8/1677890839.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acf5c0a7086---jotiwozifixew.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/tibukenilabe.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/zivulixefov.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfef07174e---98829824539.pdfIn PDF document text
    • http://htwy.com/upload/file/lipaloleke.pdfIn PDF document text
    • https://valerart.com/ckfinder/userfiles/files/76269082194.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/51c3d48f3790ffcf6c8c842e5fe3a51e/43779362684.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/duwisena.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/57006598723.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/mitugigawades.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160df64e08888f---19967569367.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/gawevotime.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/koxixo.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/26836180927.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/54186101233.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20d8d4b79---28711095784.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/zerobagevukotuzetuz.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_off0000b95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB95C 20328 bytes
SHA-256: 282723cc86f5a49d337e0d4ce823b42f374bd68f0de080f69b39d49da2d1e4da
font_01_sfnt_off0000ec6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 10488 bytes
SHA-256: d95db485480ef5c86120912cf3ad2b904061ce412e67e34799b1e0dbe752b720
font_02_sfnt_off0001045b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1