Malicious PDF — malware analysis report

Static analysis result for SHA-256 734964a79f201da1…

MALICIOUS

PDF

83.8 KB Created: 2021-07-09 06:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b07759116d5df7347f82d41880896f8b SHA-1: db2dabd3c4f56991efcbe8d29125a1ac7d50c89a SHA-256: 734964a79f201da1059d43302bf97ee8df9a0855c7573a6a0f19136a91cf26f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/4dbd1181117808fdeab5ac57bd0c6ba1/jibijubosadosumexu.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/52005cd29ca1abfe66278594389e00f8/62962358548.pdf
    • https://greenfuturevietnam.com/Upload/files/fupozok.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/ad8672cd520eff2183fee87178e4f152/boxibolip.pdf
    • http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/gobatatepegagifez.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/218f73f3d82a62cadc6a8f4bf334e332/32303994959.pdf
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/raxejezinovogedobijow.pdf
    • http://cocoal.com/uploads/file/36935062066.pdf
    • https://aordonez.com/images/contenidos/files/36946394961.pdf
    • https://alajuusa.ee/media/contents/file/78821303446.pdf
    • http://axwelindia.com/uploads/zobuvet.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073030e88824---13451191116.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608852694316f---fuxubefexebuzowovovab.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4e4f3e77b---wijakasugigonoke.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/fb437ed1f1a7a4f7637adf6c4de16fea/jusiz.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/os1ufhvebsebscoitfl59c3o72/80218295959.pdf
    • http://susasoft.com/upload/userfiles/files/34442279103.pdf
    • https://tmtteks.com/files/26527590133.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/af0ee5865eb7a875c0069153d5d1768e/zetiridibifusotu.pdf
    • http://jatyn.cn/upfiles/202106/file/1623755549.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/89ba08550c329793f274a8243c061beb/81791110509.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=find+cos+with+sin+calculator
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b8.bin
384e196d75b0a01470711fbdcf41f18d36838d973207f5c6752866f2a0f4e4df
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 16692 bytes
font_01_sfnt_off00011248.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11248 16792 bytes
font_02_sfnt_off00012a5f.bin
b70a3f2f26bc37be9d7550115c13e61f3f2b3023c24067df7f3c94b7a290ec26
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5F 10500 bytes