Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45c5711f28c29b2…

MALICIOUS

PDF

96.6 KB Created: 2021-08-11 05:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71f2746e20e8de0b16ad377ede3ac304 SHA-1: a6691264b020d2eda623dd4d7641e874a06d9dea SHA-256: a45c5711f28c29b29ec8d20adee6a05c151e4b2f97821ade527590b41a9cdd19
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised or disposable domains, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites. The file's structure and link distribution align with techniques used to distribute malware or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609984a048fa4---mebigolijub.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788b5c1b9ca---rawaropogelasixixis.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/3c3a4900d3d026a8aab50cefb1312bf4/kijelatilexipumovif.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4604627be---8787033689.pdf
    • http://polletnv.be/uploads/files/buvagefuwus.pdf
    • http://atsrealtyvietnam.com/upload/files/55280894375.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d4a713432---resawuvekenamuru.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca1792d8e7---sizalipe.pdf
    • http://amuseonline.com/absite/userfiles/file/bobidegapi.pdf
    • http://qazaqbanki.kz/data/content/files/70967449269.pdf
    • http://metabolizmusonline.hu/images/upload/file/fofugofunufidezuxelosovuw.pdf
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/99556517718.pdf
    • https://allegypttours.net/userfiles/files/diwuvaxugi.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef8ed063a4---robiworewe.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfa3582fbb---vadivonimasugifuxolokok.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/v244o71fn1q54m9fdrog4v0l70/tipij.pdf
    • http://hkt-optics.com/hkt/images/userfiles/file/padabewisat.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4c2dc1c4f---miworodezodipisamixi.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b779d3c1d71---zukudavemeduser.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/2aa61822c630242ba64c5eb16e0d9eda/tupoxit.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/7cf5e1c34e095b6adb5817989b37034a/68798839965.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rv26ccqbvqdj2s19bqhqnji52o/visotasuwejuzabutoturege.pdf
    • https://secolink.sk/userfiles/file/66045542432.pdf
    • http://studioingegneramato.com/userfiles/files/sugupewibositagu.pdf
    • http://instandee.com/Images_upload/files/80973447636.pdf
    • http://bonfiremadigan.com/uploads/fckeditor/file/vemitagepelutobip.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c0e9e7f5---lupup.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+know+if+you+itemized+deductions
    • 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_off00011637.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11637 16792 bytes
font_01_sfnt_off00012e4e.bin
81e21f204f535ebc74bbdba8f7c1734aa64b76c12cdf6ad45d95fd104c688323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4E 10772 bytes
font_02_sfnt_off00014732.bin
dc872fb15803c43bff0278cfaa6b26f0f7a68c9a5fa3986e7b3b784446fd0d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14732 16996 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.