Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0da4b622c42844…

MALICIOUS

PDF

81.8 KB Created: 2021-06-26 01:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47dd6b6da0719567f969bfcd92dfa2c0 SHA-1: ca05c4d56e0dd9b5d48b07c4303a7a7cb7ee4ae8 SHA-256: 1e0da4b622c428441b12997282bf15f3cee9847ebe6b8136e0cc30ee2d73d2c0
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 CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of link farm heuristics further supports this, suggesting the document is designed to lure users to malicious sites.

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 http://patronusalapitvany.hu/public_html/upload/58250832014.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/0ddf138fc09a639aaccdeed26be2b110/20895665051.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160744c56eb6d4---zoxibudefitovigilano.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/aad74b10018f2275625e170ba6062b33/69229985147.pdf
    • http://aep-tc.com/cache/fck_files/file/sitakugebis.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/185091a87649e7269ba7e148b335b19c/9402672121.pdf
    • https://ntpuvoice.com/ckfinder/userfiles/files/kevomufipodikexilaw.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17ef361d85---65293215123.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/2e069ef24de8ff90c0d12727dc32c21a/gilekefisiborinodoru.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/vjaggts67ilr5bbie9helsjtsl/66472857569.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5918ea525f---gonutijejub.pdf
    • http://photo-preiss.com/upload_files/files/disunijezipiritom.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160771139b86dd---8300007092.pdf
    • http://ofipapel.org//ckfinder/userfiles/files/xixepatopagivajupozowaxen.pdf
    • http://guchenes.com/d/files/88915451531.pdf
    • http://lpkgoodframeupvc.com/userfiles/files/migabinadawodog.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/eeebcc89b7caf9e1fbf8cc6867100f58/fakotixafijapazulesev.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8403b2f2e2e2ef582300c380ae01e74f/35770510837.pdf
    • http://yuanjen.com/ckfinder/userfiles/files/datigiloza.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/3d3bb929648765465ab72ced3271673c/11514004122.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=winstrol+injection+cycle+for+beginners
    • 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_off0000dcd7.bin
ca48567c0b3f767320691641ba2e9bbee1389f54722b7a337a92c98eb7ab62db
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 17016 bytes
font_01_sfnt_off00010954.bin
2dbbb5c274821cbdc4a47018b3123cf624f3c40f7c3c719a1d3f98bcb90822a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10954 10724 bytes
font_02_sfnt_off0001221c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1221C 16792 bytes