Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5ae04ceafee26c…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 13:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 65bb5d84c71473eebe5a09943d446c59 SHA-1: 343bb22804f412276b75d3ebd474b4a48389a9fb SHA-256: fc5ae04ceafee26cc4add9753233700272726ffa5170895d0661566072c9a8ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links, many of which point to disposable domains or IP addresses, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to further malicious content or downloads. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/moraraso.pdf In PDF document text
    • http://coumert.com/images/file/popavotasususo.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/95092944796.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/25173062248.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/pakaxujoxawiwina.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210911061108.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/75255379210.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/58626069348.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161417b2778e4c---25411966764.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/71040951432.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/bilefiwufebepogoxejonef.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/43733796170.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/movasugej.pdfIn PDF document text
    • http://hanleyresources.com/images/97462308879.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/6e828e6bfa4eb9ab0dc0678148dd2788/43072665119.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/28644103319.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/48387515813.pdfIn PDF document text
    • https://rosycaffe.com/file/zajadanani.pdfIn PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/54800184580.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161461c7e05da3---5568616880.pdfPDF link annotation
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/77835175696.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/16584195323.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/2873001695.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/vunogejipizojazuwotalela.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=fb+hacker+pro+apk+1.0+downloadPDF link annotation
    • 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_off0000ce96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE96 10788 bytes
SHA-256: 1621b7b37a86de0864fc14cd35a39a202baa73e7a83ba4529c3c5390a7f7ac34
font_01_sfnt_off0000e735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 21604 bytes
SHA-256: 6b5d7a2d9b65716d096b160a05c5385ccc28187f19a87ee6ea3972f848897f76
font_02_sfnt_off00011f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1