Malicious PDF — malware analysis report

Static analysis result for SHA-256 434dbbee682e1bb2…

MALICIOUS

PDF

103.0 KB Created: 2021-07-03 03:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7a1de2f015b0c38b80e22ab9ae03733c SHA-1: 0da89039c5f83a684bd0a63589422247478eedbd SHA-256: 434dbbee682e1bb2c2910461d3cbe01be7819c53db3474450c25b8793f6ec6a1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • 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.
  • 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 https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/05650ae70a16b6b37a99b171128281e0/mamonezamazuzuluwegijuru.pdf In PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/kexuxakepenekokani.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160714cda505fd---riwanigo.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/34ab163733f975dffbbdb08b9dd80d44/33428427402.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d06cadbf3---bivefekajariwogivi.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a243abc8a94---benukizojomexumoso.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/51590487017.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/jurusolewagufipa.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/tegezefebapeviwojux.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916c5487f66---73009447856.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/73902831759.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/3809869345.pdfIn PDF document text
    • http://ddrwc.net/clients/869849/File/zemibelofifemibara.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/bemerafebil.pdfIn PDF document text
    • https://wagaskar.com/media/nubomin.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/cdhhe5qi4lhic76s2c2aco27o2/46009201647.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d13ca5e6d---60820452083.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/4dhtb9dqbe6g4g86msajceh868/zujima.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa18b865ad---94460227588.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/88329078366.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/fitegamanu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gold+in+dndPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11257 19808 bytes
SHA-256: 5327829f4e2dc84ce89a7ae4e1a6d79bdcf165b0ca275103d9ea9b8bffa83771
font_01_sfnt_off000145d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D0 17968 bytes
SHA-256: 3ad07edbef356254c5384c588de72b58fc17144922b5fe7653c30488450b9295
font_02_sfnt_off000161f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161F3 9620 bytes
SHA-256: 21e27b951f3332376d04280a239387027a52a78690444862a35c43bf6c3b6a86
font_03_sfnt_off000176c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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