Malicious PDF — malware analysis report

Static analysis result for SHA-256 96de8a3c32f84526…

MALICIOUS

PDF

89.7 KB Created: 2021-07-05 18:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 116ad4b921a2e173fadc707ee6270b16 SHA-1: 89915822f21a7982f3209df638f5c7574d018ccd SHA-256: 96de8a3c32f845267f3a099d2ac89efd032831d9138284f298b13b71d7b52de5
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 WordPress sites, suggesting a link farm designed to lure users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent. The presence of multiple external URIs and link farms on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/15d1041d68402503a215854962521832/92712608708.pdf
    • https://sasalidayanisma.org/uploads/file/nebezuxatajet.pdf
    • http://yilip.net/userData/board/file/30268551829.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/gj56shkqdfjcsgpitl648rtt77/vifuxuguwuraselorimuni.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609d65a5835d9---xabelajetular.pdf
    • http://a-swiss.com/upload/userfiles/file/ganulerotafonajipulijer.pdf
    • http://www.jindatunnel.com/up_files/file/piwubutu.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/00ee8c5f2687962f2acf0b6968494db0/nexonatimefazuref.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79bf576241---labajofub.pdf
    • http://dispensapertutti.com/userfiles/files/4504067822.pdf
    • http://pokorny-podlahy.cz/UserFiles/File/74191303774.pdf
    • http://bezagsecurity.cz/userfiles/11701001900.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/b22b0cce024e988d5ff28323a5dcbb3d/rivebujisupokugeduneb.pdf
    • https://behagi.eus/files/galeria/files/zanem.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/pm0psusjd5vt93g72s3truj8j6/tazenuwepagokitejezupaki.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/3d3beec41dc5e1216f5d435706e62c4b/37584967270.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c86df89b4ed---59120186202.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d27769b5da2---janefep.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b876a28e4---13010638927.pdf
    • http://starcity-vinhomes.vn/app/webroot/img/files/37588464966.pdf
    • http://novichiha.ru/pic/file/88153839513.pdf
    • http://studionegro.net/userfiles/files/lufulodofanaxudusuwike.pdf
    • http://barcelonasixtytwo.com/userfiles/file/pipexinebekubanejavak.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=leadership+without+easy+answers+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_off0000fc70.bin
2d11b048797d845b68b62be9f937e89ff33e85a78d5651dd4dfbb7d4d45a03fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC70 10808 bytes
font_01_sfnt_off00011556.bin
98cadaa3379d44a0d8aeb934d2204f052eb6b5965150a80bf892e893f1ce81df
pdf-font-stream PDF embedded font (sfnt) at offset 0x11556 16980 bytes
font_02_sfnt_off0001419b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1419B 16792 bytes