Malicious PDF — malware analysis report

Static analysis result for SHA-256 1294fcf0ec117c98…

MALICIOUS

PDF

91.1 KB Created: 2021-06-29 04:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f1b4693f5ef8edfd12d7a79006e11f99 SHA-1: 2673485d63528f4aac58ad5542b56005e38c555c SHA-256: 1294fcf0ec117c9894c2a37bf739909413b006a5047e12584e9b430bf6b737e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious destinations. The presence of external URIs and link farms indicates an attempt to lead users away from the document to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/bebdf9edf3f2e52b3d1f0435eeedc8f7/zopojogujoxuva.pdf In PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/947fc0fdb5ca6dc0c66cf7367b23bcf7/4478089147.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/9575cb03b25350a9213ad4d87f976826/bebexujevegogarudolozoti.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/fcb94a3d5408eb4d0680b4bc7803eff2/65970956858.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/9f1f853158d1c9789ce691776f6911f7/basito.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c21a328edd35a22701b15348086f9441/66181913053.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/dbc3dc06ad1a1c00c176af7b0ab9c91f/bewazavapojoreneru.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/72496306512.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608504f7ba80f---18851635270.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/58294572512.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/12c0b41d47a3c570a459a29e65142ed6/52080514431.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/40550493533.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160700ba8f35bd---xokiwobep.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d39f2daae---rovijuvovofobusanakel.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/9100047963.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/ff48b6566da979010fcd5f5fc881f728/43551332993.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/dea8ff2aa3b578f78448746e2f3cb9bf/9915187039.pdfIn PDF document text
    • http://jarosi.hu/files/file/solaketinigod.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bed3f3b8c---dovav.pdfIn PDF document text
    • http://liddellgaryfamily.com/clients/863293/File/rewewopug.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/24501471552.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/b818914dfb7b947792b53d085597ed1f/3664655358.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=sugar+cookie+icing+without+powdered+sugarPDF 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_off0000e988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 11100 bytes
SHA-256: 725cb5bb6eff60b5441a5c92d23316b293def89a788b3118c6aedfb7d9aa0e6a
font_02_sfnt_off0001187e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 16948 bytes
SHA-256: 3fbefabf8fb3a626f62118a1b560bcb9864c52dab7a4880b4c557a6909ae3d04
font_03_sfnt_off00014481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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