Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa24dba973b6f3b…

MALICIOUS

PDF

80.8 KB Created: 2021-09-02 13:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d0827a608c10121dc3259ded1b3c10d6 SHA-1: 0fb2de480d982a411d1f6ca8e81965101c25e78b SHA-256: 2fa24dba973b6f3b937d379ddf00d939da9d8c9fdddf34ba92dd1c9c54c44e6b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or SEO poisoning attack. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/ced3c6d887ecb325be848885faa8086d/22691275926.pdf In PDF document text
    • https://telewebmarketing.com/FCKeditor/file/lasalavarapolifu.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/fr8bqstfbp6hocj3ntfkhpco53/dibusufepevewaxowol.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc19be69d6---dinulo.pdfIn PDF document text
    • http://fairmonteast1975.com/clients/0/01/014dde3c838f86fef2ac1d31a86c415b/File/vifiwerewilu.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/mupixovulexevup.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/bozejozebolovagedu.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/2677192086.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/hh3h8ngv3833e07mncu7qjqu41/77180791234.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/2c2eeff40ec7c28c5134be22e6ffc1be/kakazeralitelipelin.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/vebewaw.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/dowigidilisotuzopi.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608b881773c66---94563081919.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/n4pe384i3uaagr7tda3cbfetus/25152355088.pdfIn PDF document text
    • http://orem.mn/uploads/files/74889093442.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30784c33fd---43761396198.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2fbaf4b30faa09cde503724f009fd742/nebes.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/tinodadixojakabazatijek.pdfIn PDF document text
    • http://zjpjxt.cn/upload/uploadfile/file/dagasixofimog.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/52929130288.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/79660571466.pdfIn PDF document text
    • http://itcck.org/upload/editor/file/mogep.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a141dad7f95---likutosuma.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093f3e13915e---rexodevuruxemij.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/79300223842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=cannondale+lefty+service+manualPDF 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_off0000d623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD623 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3A 10948 bytes
SHA-256: b6dbbee6efd18e1ea88e230c3e3cbff068ae54294fd60f0bf4dba730ffc67f45
font_02_sfnt_off000107af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AF 17528 bytes
SHA-256: bb20bf3044f2f238f5736c46cd1874e4f7d3cd2fcb0fc187a3305b58f880bfdf