Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ab85fe847bead7…

MALICIOUS

PDF

84.9 KB Created: 2021-06-28 16:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ce4eba58987390bfa313513d7c107606 SHA-1: 0f51c7cc4a3166f3daa3cdd8eb3767608f755df9 SHA-256: 14ab85fe847bead740924d31724be2153239631045b2a8ca5911df767603bbef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to compromised WordPress sites, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this is a phishing or trojan delivery attempt. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc58e85e82---74270587172.pdf In PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/5dc2d0d1686461eaf9961c43221ca0fe/vebokitusufuw.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a929f38d112---5812652453.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/zizaxamokufivozutuxiti.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/b5697d1ffbf5b8599320b10291e4aedd/webamunaposutezoka.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/80qkbuu2837aq984hcvp60ban6/54514391901.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/39537128317.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/4dc0a5f28d7579907d7f4c453f4d37a5/leroluzoriroze.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/dadesugezapekixize.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b882fce6---42380727059.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e09b66b96a---99673778827.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe50fc0a35---35365262273.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9a63ff07---32446465416.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2cb6f0aea---31600802734.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/1279338436.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/tulixojurebomalegipani.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d111c9b38616df1fda340061af38a2f9/nutatipiv.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/kewefi.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608cefb9621f5---vixodolosesivip.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/p2r58fr5kk9elher9q1bh3qpq7/73873185714.pdfIn PDF document text
    • http://valeneighbors.com/userimages/jegovamimujunazu.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/9e5e79afbd03cd92ee2d9d823cd2ef48/bopokodotulafisa.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081392ad20e4---gologalidevewanusofupu.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/xenuvetam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=rice+water+everydayPDF 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_off0000ebff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 16692 bytes
SHA-256: cdf560b84490975ab5d5a803d53b609b0681992dc8b7d471efef33ccbd67cb14
font_01_sfnt_off0001176c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F83 10236 bytes
SHA-256: b8dcd5510df2d01ce5a9e1bc315519edf64853383cd426c9b463c9a098096341