Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b11b94e4c7bd2e3…

MALICIOUS

PDF

85.1 KB Created: 2021-06-27 14:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e47fc4412358bbd464f32a47af748db SHA-1: b757000e2705c58c79f3a71a52c8b1d9371f0eff SHA-256: 5b11b94e4c7bd2e35e69a009927bd081000bc15ab042c49613c7feb145fb1692
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=what+does+it+mean+when+you+dream+that+you+can+fly
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/pkb16u68mokaqd4ih318sslbe0/26294826837.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5a6f04f7a---62175396272.pdf
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/73797297897.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/d708a75367ee9e8a83b7724254f917ef/wanujesajube.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-5-23/20210523020547834075.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/34589f3bb8b011f76150783c61d8018a/lukepukexowifetetoranar.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724f4a07926---14784396557.pdf
    • http://pcccphucvinh.com/upload/files/pefikenigorimilefejekore.pdf
    • http://backupcenters.com/userfiles/file/witoluge.pdf
    • http://roland-toys.eu/userfiles/file/delunawokuse.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/l9if0fh7pshho2g6k3p43op48b/62561745676.pdf
    • https://bandotrading.com/uploads/file/37974595889.pdf
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/67659571757.pdf
    • http://animationcoach.com/userfiles/file/53114930622.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0f7d558bb1f34773fd88a105af6d0843/37339242131.pdf
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/runevulugemitikerokabixix.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d93f3493b9---nawetuwebuleduwamizabed.pdf
    • https://ahreco.com/uploads/news_file/fufexajagesozoleweg.pdf
    • http://landpas.pl/upload/file/50683571584.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160841ec01804c---detasarilugenozuvar.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3dd1d218eb---xogapavunilewidigafa.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160957169bbebc---97647238006.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/5da5ca8443aef2d02505cb6b6f15174b/morabamexo.pdf
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/vabexupujon.pdf
    • 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_off0000eb15.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB15 16792 bytes
font_01_sfnt_off0001032c.bin
5212cc05aa4783d454d8fe3b7a3182b034ad7b9c50308159a83d25d0bef584f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 11036 bytes
font_02_sfnt_off00011cb5.bin
262c59cd4534a8b04835b9effdff0385fef0ab781d7eb2e5d63958d6a86c43a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB5 16352 bytes